The files "outside the Library" have just been "Add/rescanned". The properties in the Main List are the corrected.
The right windows is Properties of the track in the Playing list, started in explorer.
1. Copy a folder with new tracks in a
monitored directory
2. Play one new track from explorer
3. To make shure that all tracks are in the Library: Find more from the same Folder (All)
4. File: Add/Rescan files to the Library (current folder is tagged)... wait until finished.
(In my configuration, 6 - 8 files from 20 are reported as new)
5. Select all tracks and change the properties. (wait until finished),
Now I can see the different properties in the different lists.
(Build -> Signature)
Replicating this, I have noticed another problem, that could be the reason.
In 5. not all tracks are completely classified correctly. They are in the Library, but not in the Album, shown in
this video.
The 7 files added in 4. are not in the album.
EDIT: When I refresh (F5) the Main List between 4. and 5. all tracks are tagged correctly
EDIT_2: MM5 has two different import methods.
It doesn't consider the (wrong) Album Artist during Continously Monitoring import.
But Add/Rescan takes over the Album Artist, so that MM has different Albums.
One with the automatically imported tracks, an one for each track with an individual Album Artist.

I would recommend to use only one import algorithm.
The files "outside the Library" have just been "Add/rescanned". The properties in the Main List are the corrected.
The right windows is Properties of the track in the Playing list, started in explorer.
1. Copy a folder with new tracks in a [b]monitored[/b] directory
2. Play one new track from explorer
3. To make shure that all tracks are in the Library: Find more from the same Folder (All)
4. File: Add/Rescan files to the Library (current folder is tagged)... wait until finished.
(In my configuration, 6 - 8 files from 20 are reported as new)
5. Select all tracks and change the properties. (wait until finished),
Now I can see the different properties in the different lists.
[size=85](Build -> Signature)[/size]
Replicating this, I have noticed another problem, that could be the reason.
In 5. not all tracks are completely classified correctly. They are in the Library, but not in the Album, shown in [url=https://vimeo.com/804204931]this video[/url].
The 7 files added in 4. are not in the album.
EDIT: When I refresh (F5) the Main List between 4. and 5. all tracks are tagged correctly
EDIT_2: MM5 has two different import methods.
It doesn't consider the (wrong) Album Artist during Continously Monitoring import.
But Add/Rescan takes over the Album Artist, so that MM has different Albums.
One with the automatically imported tracks, an one for each track with an individual Album Artist.
[url=https://ibb.co/hBdKrX5][img]https://i.ibb.co/8rxjGz3/different-Albums.jpg[/img][/url]
I would recommend to use only one import algorithm.