Yeah. The organization of the forum is a bit wonky. And it's only going to get weirder with the recent drama and the 6-7 specifically 5E compatible games announced...plus all the others that will come along because of the CC thing.
Official D&D. Only officially branded, current edition D&D stuff, I guess...plus the occasional "general" D&D thread...plus the occasional A5E thread.
One D&D/6E & OGL. All the drama and edition change stuff. So what happens to all this when 6E is launched? Does it get moved into the Official D&D forum? Does it get removed entirely? Renamed and hidden until there's another edition change?
Older D&D. Plus 13th Age and other d20 related games...except Path & Star...but somehow not the 5E clones?
General TTRPGs. Everything else, including...paradoxically...5E clone games, except A5E.
If it made sense at all the 5E clones would go in the 5E forum, or the "older D&D" forum. Not the TTRPG forum.