I believe it is the way it was pinned. One of the options is Pinned Globally.
I think that is what causes it.
I’m not sure the reason as I didn’t do it but I’m guessing it was Pinned Globally as it was a major set of rule clarifications for our most contentious forum.
Also we lost Jonathan_Chance last year in October. That may have something to do with it.
I’ve made some formatting edits to it but otherwise it is as it came over in the conversion.
You should be able to unpin for yourself if it is a bother.