diff --git a/Pipeline/Build.cs b/Pipeline/Build.cs
index a07a0cc08..25356ef59 100644
--- a/Pipeline/Build.cs
+++ b/Pipeline/Build.cs
@@ -19,7 +19,7 @@ partial class Build : NukeBuild
 	///     <para />
 	///     Afterward, you can update the package reference in `Directory.Packages.props` and reset this flag.
 	/// </summary>
-	readonly BuildScope BuildScope = BuildScope.Default;
+	readonly BuildScope BuildScope = BuildScope.CoreOnly;
 
 	[Parameter("Github Token")] readonly string GithubToken;
 
diff --git a/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderCollectionMatcher.cs b/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderCollectionMatcher.cs
index a7236658e..2f32f296c 100644
--- a/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderCollectionMatcher.cs
+++ b/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderCollectionMatcher.cs
@@ -84,7 +84,7 @@ public bool VerifyComplete(string it, IOptionsEquality<T2> options, int maximumN
 			}
 
 			List<string> errors = new();
-			errors.AddRange(IncorrectItemsError(_incorrectItems, _expectedItems, _equivalenceRelations));
+			errors.AddRange(IncorrectItemsError(_incorrectItems));
 			if (!_equivalenceRelations.HasFlag(EquivalenceRelations.Contains))
 			{
 				errors.AddRange(AdditionalItemsError(_additionalItems));
diff --git a/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderIgnoreDuplicatesCollectionMatcher.cs b/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderIgnoreDuplicatesCollectionMatcher.cs
index e95a2230a..eb4c2e0b3 100644
--- a/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderIgnoreDuplicatesCollectionMatcher.cs
+++ b/Source/aweXpect.Core/Options/CollectionMatchOptions.SameOrderIgnoreDuplicatesCollectionMatcher.cs
@@ -101,7 +101,7 @@ public bool VerifyComplete(string it, IOptionsEquality<T2> options, int maximumN
 			}
 
 			List<string> errors = new();
-			errors.AddRange(IncorrectItemsError(_incorrectItems, _expectedDistinctItems, _equivalenceRelations));
+			errors.AddRange(IncorrectItemsError(_incorrectItems));
 			if (!_equivalenceRelations.HasFlag(EquivalenceRelations.Contains))
 			{
 				errors.AddRange(AdditionalItemsError(_additionalItems));
diff --git a/Source/aweXpect.Core/Options/CollectionMatchOptions.cs b/Source/aweXpect.Core/Options/CollectionMatchOptions.cs
index de6edb16b..1acddf374 100644
--- a/Source/aweXpect.Core/Options/CollectionMatchOptions.cs
+++ b/Source/aweXpect.Core/Options/CollectionMatchOptions.cs
@@ -152,21 +152,13 @@ private static IEnumerable<string> AdditionalItemsError<T>(Dictionary<int, T> ad
 		}
 	}
 
-	private static IEnumerable<string> IncorrectItemsError<T>(Dictionary<int, (T Item, T Expected)> incorrectItems,
-		T[] expectedItems,
-		EquivalenceRelations equivalenceRelation)
+	private static IEnumerable<string> IncorrectItemsError<T>(Dictionary<int, (T Item, T Expected)> incorrectItems)
 	{
 		bool hasIncorrectItems = incorrectItems.Any();
 		if (hasIncorrectItems)
 		{
 			foreach (KeyValuePair<int, (T Item, T Expected)> incorrectItem in incorrectItems)
 			{
-				if (equivalenceRelation.HasFlag(EquivalenceRelations.Contains) &&
-				    !expectedItems.Contains(incorrectItem.Value.Item))
-				{
-					continue;
-				}
-
 				yield return
 					$"contained item {Formatter.Format(incorrectItem.Value.Item)} at index {incorrectItem.Key} instead of {Formatter.Format(incorrectItem.Value.Expected)}";
 			}
diff --git a/Tests/aweXpect.Tests/Collections/ThatAsyncEnumerable.Contains.CollectionTests.cs b/Tests/aweXpect.Tests/Collections/ThatAsyncEnumerable.Contains.CollectionTests.cs
index 0387f5f20..4b9436901 100644
--- a/Tests/aweXpect.Tests/Collections/ThatAsyncEnumerable.Contains.CollectionTests.cs
+++ b/Tests/aweXpect.Tests/Collections/ThatAsyncEnumerable.Contains.CollectionTests.cs
@@ -190,11 +190,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -669,11 +672,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -1922,12 +1928,14 @@ await That(Act).Throws<XunitException>()
 					             Expected that subject
 					             contains collection expected and at least one additional item in order,
 					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
 					               did not contain any additional items and
 					               lacked 3 of 6 expected items:
 					                 "x",
 					                 "y",
 					                 "z"
-
+					             
 					             Collection:
 					             [
 					               "a",
@@ -2433,11 +2441,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected and at least one additional item in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
diff --git a/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionEnumerableTests.cs b/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionEnumerableTests.cs
index ba0615b91..8b824e055 100644
--- a/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionEnumerableTests.cs
+++ b/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionEnumerableTests.cs
@@ -190,11 +190,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -670,11 +673,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -1924,12 +1930,14 @@ await That(Act).Throws<XunitException>()
 					             Expected that subject
 					             contains collection expected and at least one additional item in order,
 					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
 					               did not contain any additional items and
 					               lacked 3 of 6 expected items:
 					                 "x",
 					                 "y",
 					                 "z"
-
+					             
 					             Collection:
 					             [
 					               "a",
@@ -2436,11 +2444,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected and at least one additional item in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
diff --git a/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionImmutableTests.cs b/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionImmutableTests.cs
index c88e82497..eecde641c 100644
--- a/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionImmutableTests.cs
+++ b/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionImmutableTests.cs
@@ -191,11 +191,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -671,11 +674,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -1925,12 +1931,14 @@ await That(Act).Throws<XunitException>()
 					             Expected that subject
 					             contains collection expected and at least one additional item in order,
 					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
 					               did not contain any additional items and
 					               lacked 3 of 6 expected items:
 					                 "x",
 					                 "y",
 					                 "z"
-
+					             
 					             Collection:
 					             [
 					               "a",
@@ -2437,11 +2445,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected and at least one additional item in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
diff --git a/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionTests.cs b/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionTests.cs
index 813f99dff..0a6a09a94 100644
--- a/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionTests.cs
+++ b/Tests/aweXpect.Tests/Collections/ThatEnumerable.Contains.CollectionTests.cs
@@ -143,6 +143,31 @@ Expected that subject
 					             """);
 			}
 
+
+			[Fact]
+			public async Task WhenExpectedContainsDuplicateButMissingItems_ShouldFail()
+			{
+				int[] collection = [1, 2, 1, 3, 12, 2, 2,];
+
+				async Task Act()
+					=> await That(collection).Contains([1, 2, 1, 1, 2,]);
+
+				await That(Act).Throws<XunitException>()
+					.WithMessage("""
+					             Expected that collection
+					             contains collection [1, 2, 1, 1, 2,] in order,
+					             but it
+					               contained item 3 at index 3 instead of 1 and
+					               contained item 12 at index 4 instead of 2
+					             
+					             Collection:
+					             [1, 2, 1, 3, 12, 2, 2]
+					             
+					             Expected:
+					             [1, 2, 1, 1, 2]
+					             """);
+			}
+
 			[Fact]
 			public async Task WhenExpectedIsNull_ShouldFail()
 			{
@@ -189,11 +214,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -669,11 +697,14 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
-
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
+					             
 					             Collection:
 					             [
 					               "a",
@@ -1923,6 +1954,8 @@ await That(Act).Throws<XunitException>()
 					             Expected that subject
 					             contains collection expected and at least one additional item in order,
 					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
 					               did not contain any additional items and
 					               lacked 3 of 6 expected items:
 					                 "x",
@@ -2435,10 +2468,13 @@ await That(Act).Throws<XunitException>()
 					.WithMessage("""
 					             Expected that subject
 					             contains collection expected and at least one additional item in order ignoring duplicates,
-					             but it lacked 3 of 6 expected items:
-					               "x",
-					               "y",
-					               "z"
+					             but it
+					               contained item "d" at index 3 instead of "x" and
+					               contained item "e" at index 4 instead of "y" and
+					               lacked 3 of 6 expected items:
+					                 "x",
+					                 "y",
+					                 "z"
 
 					             Collection:
 					             [