[ddouglass]

This will be looked at again when they work on 4.20 along with some other things. There just isn't enough time right now for them to delve into the problem so they fixed to keep any crashing from happening by greying it out during play. Instead of trying to delete them then just Skip them (and move them above the current playing song if you don't want them confusing you) and delete them later when you have time.