When I first downloaded all of my music; I sorted specific songs into a playlist. After a week I added more music and decided to add some new songs to that playlist. Well; I went to listen to the playlist a day later and all the new music I had added was gone! I added it back; then it was gone the next day. I don't know what's happening! It's really irritating! It was there last night; and then I just noticed five minutes ago it was gone!! It's really annoying. Any suggestions would help. Should I just delete this playlist and make a new one?