There are two ways to fix it. First, select all of the songs. Right click and pick "apply sort field- same album". If that doesn't work, you'll have to do the second way. Go to "Get Info" or "Properties". A panel will pop up that let's you fill in artist information. Fill in the info for Artist, Album, Genre, Year, and the "of 11" for tracks. Then check every box next to the empty fields EXCEPT for the first half of track number. When you do that, it should group them together, but you'll lose the "feat." credit unless you add it to the name of the song.