Board Thread:Decisions/@comment-26509187-20151111205224/@comment-24338901-20151111220822

I can tell you how what you've described happens:

1. A user adds a performer (with a category).

2. Another user replaces the performer by another one (they add a new category, but forget to remove the older one).

3. Another user does the same thing to the second one or adds the performers from rfmckinley's videos (but still doesn't remove the older perfomers' categories).

That's how we can have 3 categories for performers.