For some reason, some songs are not showing up in my iTunes on my iPhone. When I drag them to my iPhone from my computer, they show up in the music list (for my iPhone), but when I try to listen to them, they are not in my iTunes. I have tried deleting them and putting them back on, putting them on one at a time, and renaming them. I have even deleted a bunch of apps to make more room - even though I have plenty. The songs are also not locked. I have tried everything I can think of. Can someone please help? Thanks 
