I’m not sure why these tags are being created, but the bigger problem I’m facing is that today I have selected these tags, and deleted them. I was then able to see them in the Trash. However, I saw that instead of just deleting the tag I don’t need — Devonthink has also put the documents with that tag in the trash. This is totally what I did not expect!
My expectation: if you select a tag, and hit backspace — only the tag is being deleted, NOT the document.
Yes, it is the correct behavior and the document is not in tne Trash. It is the reference to the document. This is discussed in the Getting Started > Tagging section the built-in Help and manual .
Just a heads up with emails: loads of your emails have probably got #whatever in them since it’s used in html.
Unless you actually need the convert to tag option enabled you’re better off without it if you’re importing emails and web content since it might cause an issue.