@oshunluvr said:
Thank you for your reply to all my whining… 
First, My music is MOSTLY filed/foldered that way except for non-album tracks. What do I do with those? My habit has been to keep those individual tracks under the Artists folder but without a specific Album folder.
This is correct, AFAIK. If these tracks are tagged, make sure they don’t contain an album tag and that their ‘AlbumArtist’ is either filled correctly with the Artist name or un-set.
That way, Plex assembles these album-less tracks under the virtual album [Unknown Album], within the AlbumArtist.
Next, ALL my files are correctly tagged, …
Clearly, some things override the tags. I would describe this as a bug. If I tag my files, my media player should honor my tags, regardless of what it “thinks” about them - even if they’re wrong.
If that is the case, you might wanna instruct Plex to give your metadata priority over the information from Gracenote. Gracenote has a tendency to assign album-less tracks to a sampler album/Various Artists.
Settings - Server - Agents - Albums - Premium Music
as well as
Settings - Server - Agents - Albums - last.fm
grab the line ‘Local Media Assets’ and move it into the top position.
That way local metadata and local/embedded cover art take priority.
In the case of a Premium Music library there is an additional check box to be filled:
edit your music library, go to the ‘Advanced’ tab and check ‘Use embedded tags’
The unanswered question is why can’t I get a rescan to have any effect unless I delete the mis-labeled tracks and restore them? Seems like I should be able to do this.
This is a birth defect of Plex. It only reads tags (mostly) when the media are added for the first time. If you edit meta tags later or rename files and folders, Plex will re-cognise the file with a (kind of) checksum but won’t consider the changes.
To overcome this, we use a procedure we call the Plex Dance. With music, you can omit step 4 of the dance.
some more tips for handling music in Plex
https://forums.plex.tv/discussion/comment/1093611/#Comment_1093611
https://forums.plex.tv/discussion/comment/1050849/#Comment_1050849