Anarch convert shows conflicting grouping

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What steps will reproduce the problem?
1. Pick 2 vampires of different (but legal groups) (e.g. pick Schuyler and Alex 
Wilkins)
2. Add Anarch Convert (AC)

What is the expected output? What do you see instead?
Expect no group clashing, instead the anarch convert conflicts.

Please use labels and text to provide additional information.
This doesn't happen if you select the AC first, or if you only have vampires of 
a single other group. Only if you have multiple vampires or different groups 
and then add the AC after.

Original issue reported on code.google.com by [email protected] on 6 Oct 2010 at 1:03