iTunes Albums Mixed and Split

I have ripped three CD's from three different artists and iTunes has grouped them together. The albums all have the same title"Greatest Hits".

How can I correct this?

Also, I have another Album which has been split into three albums because one of the songs was co-written. All songs befrore it are in one, co-written in another, and the rest in the third. What did I do wrong and do I fix it.

Thanks,

Graham

#477572

change the "album artist" tag for each album

#477663