Haven't we done this one already? - Err, perhaps. Might have skipped class for that one ... I did pick through the UI primer but couldn't immediately see it.
Let me explain until I manage to get a screen shot up.
I've ripped a various artists album into one directory ( given the compilation album name) along with the cover art .jpg
Chronflow shows the cover art for each artists song (ie multiple occasions) rather than just one occasion for various artists : compilation album name
Hope this clarifies.