iphone music files from one album showing as multiple albums

Hello,

Saw this question on the forum with an answer that clearly ignored the question... asking this question again to see if there is a legitimate answer this time...

"Not sure why this is occurring as it's only started since getting the iphone 8, never had an issue before hand. I'll go to load songs from my PC to itunes and transfer them across to my phone, everything transfers fine, however, when I view my library on my phone by either artists or album, some entries will split every track on an album into individual albums (i.e. Castaways and Cutouts by The Decemberists has 10 separate entries under album, one for each track).

Some albums do this and some don't. Made sure all tags match and are identical (both in the original mp3 ID3 tags and in itunes). Made sure all the album art is identical (if it has any). Sometimes it will split them up into multiple albums, other times it'll contain all the tracks under one album and I'm just stumped as to why this happens. Anyone able to shed any light? Again, yes, the album and album artist are the same for songs on the same album.