is there a way to fix this? i did things in the wrong order not knowing this was a risk.EDIT: this is now a bug report. the quest is broken due to a bug in the map.
"central gates" seem to be stretched across two tiles, north over south. "north gate" can be opened without the key, allowing for the sequence break. there is a "void" space to the east of north gate. the player's position on the map is not moved upon entering this "void," which is the room containing loot. leaving the room moves the player position on the visible map one space to the west.
opening the gate, which is only possible in the north gate room, only allows access to the loot room (after the fight with the named character.)
"south gate" does not open under any circumstances, preventing further progress into the orc fort, and thus completion of the quest.