Adding Cupla affects entire plan

[JoAnn]

Bob...
When you said 'round top' I thought you meant the roof, or even the cupola. So i tried making a round cupola and the software won't allow it ( it sends the roof wonky). So I made this 6 sided cupola that I think looks nice.
Then you clarified that it was a round top vent that you wanted, and I was going to tell you that there was one in the library, but I see that you found it!

Anyway, if you would post a floor plan jpeg with some dimensions and ceiling heights (use LARGE TEXT), I would have like to have some fun trying to replicate it (to see what's going on). And leave the grid turned on, too.