I have used TC for many years, and, used the Orthogonal Dimension tool exhaustively.
However, I cannot remember a time when this tool was as you describe.
So, I am puzzled as to why this could be . . .
I know this doesn't help you any, but, I find Travis's comments to be generally true, in this case.
Perhaps a repair of TC might do it?
It's a real pain, as it is!