Circular Room w/circular opening

[wctucker]

I've been having a heck of a time getting a circular opening in a circular room to show. The opening has a railing. The circular room doesn't want to show the opening. It wants either to have a ceiling or not have a ceiling. It won't let me have only the circular opening show as "open." ....and on the next floor, I can select and designate the opening as "Open Below," but the room around it will not recognize the round railed opening.
Is this a common problem, or is it me?