It just started today, I woke up and played music in my playlist. After a while I wanted to pick another song, and realized it said 272 songs, instead of my 400 some songs it's always had. I went through and fixed it, from my iTunes on my laptop which hadn't changed, and synced it to make sure it went back. Now at 399 songs, I took my dog for a 30 min.walk, and when I got home checked the playlist, and it went back to exactly 272. I don't have my phone on Wi-Fi either. So I made another playlist altogether and got it back up to 399 songs, and synced it to iTunes via laptop, to save my newly made playlist. And when I unplugged it, it was back to 272 IN THE NEW PLAYLIST.