bug: removing used code

[x1c0]

Hi, I have 2 files with the same styles

//1.css and 2.css same content

#breadcrumb ul {
  list-style: none;
  margin: 8px 0 0 0 !important;
  padding: 0 !important;
}

#breadcrumb li {
  float: left;
  margin-left: 0;
  padding-left: 0;
}

// config_css.json

{
  "options": {
    "trim": false,
    "shorten": false,
    "format": false
  }
}

when I run this: css-purge -i "1.css,2.css" -o 3.css -f config_css.json I get this weird result:

And the list-style: none; just disappeared :(

Is this a bug? any idea why? basically I have 2 big very similar css files and I want to remove duplicate styles

Thanks in advance!