Bad source in change history

I recently added a lot of posts into my public favgroups with a tagscript. And I upvoted some previews with a tagscript.

My change history shows that I would have added tags bad_source and bad_link to some of them. I have never written either of these tag names, and they have an inconsistent order in my history. I recognize the posts and they do have the favgroups and upvotes I have given them. E.g. post #221834

What was my mistake?

Those are automatic tags now. Whenever you submit a tag list, even if the tag you're adding is actually a stand-in for another function like upvote:username, the server rechecks the whole tag list and adds automatic tags as appropriate, such as implications, aliases and bad source or bad link.

Thanks for quick reply.