On meta.tex.sx, I tried to edit the tags of Text building blocks. This is the situation before my edit:
I edited the tags and wanted to submit the edit, but I got this error message:
Well, interestingly, if I add the tag "featured", I can edit the question, although I'm not a mod nor a 10k user on tex.sx and shouldn't be able to use this tag, no matter if it's been on a question before or not.
Are these phenomena bugs or do I just not understand the system?
Okay, things are getting even weirder: If I now look at the version before my edit, it is tagged "featured", but as my first screen shot shows, it actually wasn't. So later edits change earlier edits? Shouldn't be the case, imho.