I imported two albums onto my iPod touch from my iTunes library from a CD. There appeared to be two copies of each so I deleted the duplicate albums. Turns out that was an error and there actually only one of each, so I ended up deleting them completely. I tried re-adding the songs from my iTunes library, and it doesn't seem to work. And I don't want to add the entire album because I bought a few songs from them on the iTunes store. Please help.