It seems that I may have to unwatch and rewatch the thread again.
Didn't know this was a thing, I've just been going at random and blasting at all the "Class" (In Striking Strength) that I stumble upon in my patrols and have just been turning them into "level".
By the way, is this search result reliable? During my previous check, the query yielded no relevant results, yet I still found several pages, like this
one (though I think have found quite a lot, actually), that are classified as "Below Average Human Class" within the past days.