Yeah it’s a glitch with imported threads from the old forum that they didn’t inherit the flagging of the new forums. As the old threads are relatively small in number, we’ve mostly just been closing them as they’ve been necro’ed.
Having had a look at the forum settings, at least what I have access to, it seems the “anti-bumping” feature is a setting that applies to the forum as a whole, rather than individual sections. I’ll forward that on as it does indeed make sense for the Realm sections to be more lenient in that regard.