Having thought on this further, I think I get what you're saying. I do think it would be easier if we imposed an order on your descriptions that is static no matter which way the PCs are facing or which way they are entering a room. For example, if we went back to the first entrance of the dungeon and labeled "up" as "north", just for the purposes of mapping and general spatial awareness, regardless of whether or not it was truly north, and all further descriptions assumed that north was static, it would make both knowing where we were relative to the dungeon entrance, and mapping, much easier.
Is that possible?
the Medium (MV 12", AC 9, HD 1, hp 4/4, FC Man, L) dagger+torch
, The Mellifluent Concord