Handling for MusicBrainz tags in KODI music library?

I’m still searching the reasons why not all my songs are imported in the KODI music library.

Working through the list of differences, the following behaviour isn’t clear for me:

Example:
I have this album “The Reiki Effect”: http://musicbrainz.org/release/70740ac1-…246dc05a87
The following tags are saved in the ID3 tags for every song:
MUSICBRAINZ ALBUM ARTIST ID with 585a9c75-dcca-4019-97df-899921f841f9, d22a9ad4-8a40-4afe-9b3f-58d9f197a8fe
MUSICBRAINZ ARTIST ID with the same two artists 585a9c75-dcca-4019-97df-899921f841f9, d22a9ad4-8a40-4afe-9b3f-58d9f197a8fe
MUSICBRAINZ ALBUM ID with 70740ac1-ba95-44c4-8cee-68246dc05a87
MUSICBRAINZ_TRACKID with their individual IDs

On MusicBrainz the two collaborating Artists
AEOLIAH (http://musicbrainz.org/artist/585a9c75-d…9921f841f9)
and
MIKE ROWLAND (http://musicbrainz.org/artist/d22a9ad4-8…d9f197a8fe)
are credited as Artists for this album.

According to Musicbrainz I have saved this album in my own filestructure in the directory:
:\mp3\A\AEOLIAH\The Reiki Effect

Why does KODI list this Album (in the Album search) with MIKE ROWLAND but in the track listing (the one with all 12 songs) it appears as “AEOLIAH & MIKE ROWLAND”?
If I search for the Artist AEOLIAH I find the entry for the album “The Reiki Effect”, but the Artist is listed as “MIKE ROWLAND”.

Could please someone explain how the MusicBrainz IDs control the import behaviour in KODI?

Since now, I read the following articles:
Adding_music_to_the_library#MusicBrainz_integration (wiki)
Adding_music_to_the_library#Technical_Explanation:_File_tags (wiki)
MusicBrainz_metadata (wiki)

Is there any article with further details?

BTW: I have deactivated every external metadata search I could find. This way I hope that KODI only import the already available informations from the files (ID3 Tag).