Thanks for the post and the comments. Yes, Tombs should show "X x X" similar to the Prestige Room. And you are correct, the minimum room size for all rooms would be 2x2.
I'll have to go back to my notes and see if the Tombs were supposed to have a different minimum room size.
Also, thank you for the special information revision note as well. I appreciate your time and comment! Thank you for being a fan of games!
-James