Originally posted by FissionChips:

That's appears to be what's happening. One time I chucked on devcommands and had a fly through the wall to take a look.

Smart! i did not think of even using dev commands to check it out.

Originally posted by Fish:

i...if you see the eye half open that means you missed a room, if you see its closed that means you cleared the crypt.

Awesome tip! Thank you, I will do that from now on just be sure.

Thank you everyone for the very speedy responses. That crypt it happened in was massive...I got several hundred scrap iron out of it, which is my best haul from a single crypt so far, so I would have been surprised if it was even bigger than what I'd seen already.