My wife has an iPod nano 7th generation. We have it set to only sync checked music in itunes. ONe album will not sync to the iPod. We've tried checking it and unchecking. When we plug the iPod back in, the album has a check mark next to it like it is on the device but it isn't. We unchecked and another album. Both were not on the iPod. We plugged it back in, checked both and the other one transferred fine and the original one we wanted did not. I even restored the ipod to factory settings and it still wouldn't sync that one album. Any ideas?