Songs aren't showing up in the right album

I've got a handful of songs I've downloaded that aren't showing up in the right albums on my MP3 player (It's a Coby MP707 4G). I've already gone through their properties and filled out the correct info (artist, album, year, etc) and all of that shows up fine on both my computer and in the files on the MP3 player. I've also tried deleting and reinstalling the songs - still no luck. They just show up under "Unknown album" when I turn on my MP3 player. Is there a way to fix this?