Edit:
These actions are wrong. I leave this posting as I wrote it because this is necesaary for understanding the next postings in this thread.
The corrected actions are written further down in posting #8. Tagging from folders and files
Ah thanks for this, it makes so much sense I got super excited, but alas it refuses to work.
So below is how the files appear in MP3tag
And here is how it is in explorer
So it looks like your naming convention should work and I believe thats how I have set it up but no dice, I run the group and MP3tag just says 0 files changed.
The third action is based on your information in the initial posting that the tracknumber-information in the filename has ", " as a delimiter from the title-information.
But your screeenshots show that the delimiter is " - ".
So the third action has to be: