I have recently moved to an iphone 6 and about 20 recently added songs are missing from my playlist. I have deleted and redownloaded the app, logged off and on and nothing has worked to bring them back. They're tunes and I'd really like them back on playlist, they're still showing on my laptop so they have not been removed from the playlist, they're just missing from my phone. If I try re-adding the songs, it says they're already there. Please help me.