Update: As some have pointed out: the restores can be rollbacks from the server issues or post haven’t been properly deleted due to subs being private during blackouts. Many have experienced the same issue, I can’t explain how this happens. I’ll just run the script again, try the GDPR request and delete my account.
Also worth noting: according to the ToS Reddit can actually do whatever they want with existing content, apparently we agreed to this when signing up.
There was that kerfuffle ages ago about u/spez editing comments in r/thedonald, iirc. It’s not like it would be that much of a stretch for him at least.
But it looks like from OP’s edits it may be unintentional. I’ll withhold my rage for now.