It's not that they're various artists on a single album (say a movie soundtrack). It's the same artist from the same album they produced. (like Weezer and Weezer (The Green Album..which they have three albums named Weezer which gets real annoying). I understand what you mean since I do have movie albums that I have combined using what you described.

Unfortuantely I fixed the problematic songs already, but the next time I load songs onto my tablet that I find does this, I'll be sure to send a sample to you to see what's the issue.

I'm certain it's a tag issue since the problem gone away after I updated the tags in the programs I use (the program also auto deletes existing tags) to make sure it's clean. When I tried looking for the differences among the affected albums I couldn't see anything significant so maybe you can find something I missed.