Music Thumbnail issue

All my music is tagged correctly and has the right ID3 tags etc… however when playing back an album say Now 95 when in the full screen playback, certain songs show different artwork than Now 95 and instead show album artwork from the artists…? i’ve rechecked the ID3 and folder properties however they are all correct…

please help it’s driving me nuts!

PS, I checked another skin on playback but it’s fine, have I selected something without thinking?