I see this issue plus another one - kind of related one…
Where admins post in a top level category when it’s read only (“See”) and only sub-categories are writeable (“Create / Reply / See”) for new posts.
This is mostly handled by “public shaming” and “jovial abuse” between the moderators and admins - some call it “education” - not something I recommend.
… over time these users try harder not to make the mistake.
Because of the number of admins / moderators these topics usually get corrected quite quickly - however this can be more than embarrassing when an admin posts a private topic - publicly.