Verify that all albums (or more precisely: all tracks inside a certain album) have an AlbumArtist metatag present, and that it has the same content on all tracks of one and the same album.
Then sort the albums according to the AlbumArtist tags into your folder structure.
If you use mp3tag or similar software, you can even automate this.
/Music
/AlbumArtist 1
/Album 1
/Album 2
...
/AlbumArtist 2
/Album 1
/Album 2
...
...
Sampler Albums and Compilations/Soundtracks must adhere to this rule as well!
The AlbumArtist for samplers is usually named Various Artists. All albums tagged with it must therefore go into an Artist folder named
/Music
/Various Artists
/Sampler Album 1
/Sampler Album 2
...
The only exceptions are albums which can be attributed to one known artist, which can play the role as AlbumArtist. Like e.g. soundtracks by Hans Zimmer, or mix albums by a certain DJ.
But these exceptions then must go into their own artist folders, they must not remain in the Various Artists folder with all the other samplers/soundtracks.
