I have a different account that I use on a work computer, I ended up posting in that same subreddit without realising my original account was banned (hadn't logged into it and noticed that was the case)

Reddit Perm banned both accounts for ban evasion and for awhile any other account I made, even though i did nothing wrong or didn't post on that subreddit again, until I made sure to use completely clean profiles whenever I want to use reddit.

Annoying.