I am running iTunes 11.3.1. Suddenly I seem to have a lot of duplicate Playlists. Not all. e.g 90's Music, 90's Music1...Classical Music, Classical Music1...Top Rated, Top Rated1. You get the picture? Thing is only some, but not all of my added playlists are duplicated. I don't know what might have caused this. Any suggestions? Also, if I go through, deleting a copy of the duplicates, will it matter which one I delete? Thanks.