This will seem like a very dumb question to you experienced cave divers, but I need to ask it to understand what I'm reading here. When looking at the map of the cave system, are you looking at it from the side (like it was an ant farm) or from directly above (like a road map)? I don't see anything on the map to indicate one way or the other.
'Road Map' projection. If it is the 'Ant Farm' they usually draw brick layers/trees.