OK the artist seperation help works to a point. It does not do it fully for some reason. I have it setup nicely but when it went to play Pink it left 2 songs one of hers by herself and the other with a ft but the others like this were all xed out like they are supposed to be. So might need some tweaking to see if this is a bug?
And|&|and|ft|feat|F.|f.|Ft.|ft.|Feat.|feat.|Featuring|featuring|;|,
This is what I have setup in the txt file. So your guess is as good as mine.