Some of the segments are locked by one of us mere mortal editors rather than one of the super editors such as your good self
Those segments can be unlocked or edited by me whereas others locked by someone at a higher editing status don't give me any access.
While it's not consistent right now, I don't think that's a big problem, although it does mean the likes of me can "fix" or "break" things without an update request. Is there a general convention for this sort of thing? I'm perfectly happy to go along with that if there is