Why so many Unknown Artists

Plex Media Server Metadata & Adding Files
4

My Environment: Plex Server Embedded in MyCloudEx2Ultra

Plex and MyCould
Plex and MyCould943×530 67.2 KB

Example of typical Folder structure: Y:\Phil Collins>Face Value

Phil Collins_3
Phil Collins_3943×530 35.3 KB

Example of folder structure with several artists:

Barbershop Quartet folder
Barbershop Quartet folder943×530 52.3 KB

Example metadata Phil Collins>Face Value: Missing Track 1

Phil Collins_2
Phil Collins_2943×530 64.1 KB

Example metadata Phil Collins>Face Value: Track 1 Fixed

Phil Collins_4
Phil Collins_4943×530 67 KB

Example Plex View: Phil Collins>Face Value Unknown Artist

Phil Collins
Phil Collins943×530 220 KB

Example Plex View: Phill Collins>Face Value in Edit Mode

Phil Collins_1
Phil Collins_1943×530 177 KB

Example Plex View: Phil Collins>Face Value Fixed

Phil Collins_Fixed
Phil Collins_Fixed943×530 174 KB

I have now found many of such Unknown Artists. I have been able to fix some but not all, by following procedure. above.

Question 1: Would it be easier if I just delete my Plex Library, Clean Bundles, Optimize database, fix the metadata, and then rebuild my library?

Question 2: Do I need to do the Plex Dance as part of my fix?

Thanks.