Playlist glitch

I have seen other posts in here with the same issue, but no answers. For some reason, whenever I try listening to  playlist number 2 or higher, it goes back to the first. It didn’t use to do this. I think it might have been from a CD I was given (it gave my computer issues also). I have tried removing the songs that were from that CD, I tried a firmware upgrade, and I’ve tried formatting.

Anybody?