Album artwork is in chaos

[KBug]

I have an album with 7 tracks to it, I added a poster as album art from get info. Now in coverflow grid mode I should see only one poster for the album but I see 7 posters for 7 tracks. How can I correct this ?

I tried to select all the 7 tracks of the album, get info and under options tab I enabled 'Part of Compilation' to yes. This doesn't help either. Look at my current iTunes in Grid View with chaotic Album Artwork :

 

[Tommo]

I have had this a couple of times. Sometimes setting the Album Artist to be the same for all will resolve it. First make sure there is nothing obvious by making the album title to be identical for all tracks. I have been caught out once by trailing spaces.

 

[KBug]

Thank you very much, worked like a magic. The problem was every track had a different artist, I fixed by entering the same name for every track!!