Yes, that appears to be all as it’s supposed to be.
Last idea I have, is that the number 101 at the beginning of the album title is somehow interpreted as a disc or track number, and thus causes Plex to misinterpret the whole structure.
You could try this:
Create subfolders for each disc of that album (named like Disc x) in the place where the FLAC files are. Move the FLAC files of each disc into their subfolder.
Then perform the Plex dance with the album.
