Itunes - sorting compilation album

I have a compilation album in itunes that I can't get to display as one album in cover flow (rather than a separate album for every song)

The album name is exactly the same on every track, I have even changed the artist so it is just the album name. The "part of a compilation" is also checked. there is no over parts filled apart from the track names

I cant figure out why they wont appear as one album.

any ideas

(its a now 77 album)