I’ve been noticing this more and more in the modlogs, with it proven via the “creator” option in some instances’ modlogs that the people doing the bans were mods and not admins, and when I first joined Lemmy, one of the things that were held as a universal truth was that this absolutely could not happen.
I can’t answer. Only add that I looked up my own mod action list some months ago and saw that I had been banned from a handful of communities for 3 months. But it had happened like 7 months before, and I never noticed. I’m guessing that is what happened.