Why wont it combine?

I have a total of 77 Podrunner tracks in my iTunes library that I have added. I would like them to show up as a single album, with a single artwork, however when I look at the tracks, I get four different albums.

I've selected all the tracks, and changed all the tags to be the same. Am I missing something?

All of the tracks have the same album, artist, and and cover. The only things that differ are the names, and the BPM




And if you can solve that problem for me, maybe you also answer another one.

I have two books in my Audiobook library that refuse to add covers. I cant drag covers in, add them using the button, or do anything. It goes into the box alright, but as soon as I click okay - nothing happens.