When I add a audio CD to iTunes it doesn't keep it under one album cover like it does when I purchase an album from the store. That creates a lot of clutter. How can I keep it all together?

For reasons known only to apple, the main sort priority now is the artist. ANd when you have a compilation album you end up with multiple 'albums' that are really one. You can right click on the songs and edit the info for each song, making the info right for all of them.....it may not be perfect but it works for me. (My music is all ripped from cd's and not downloaded from Apple)

In your case, you could mark each song as 'various artists' and then they'll all be under the same cover