Board Thread:Wiki Discussion/@comment-5235303-20130411095021/@comment-5235303-20130425091051

I've only encountered this problem so far with the Kagamines mash-up of "Paradichlorobenzene" × "Antichlorobenzene" and "Migikata no Chou", where both versions are originals. There are also mash-ups with both the original and covers of the same song.

I think might be best if they get their own category as well.