Yea - I must have fried that brain cell or something cause I'm having a hell of a hard time figuring out whats going on.

I checked all my preferences in Carrara, read documentation and have spent way to much time looking at the screen going "WTF is going on".

Ok - I just created a small screen 30" x 30" and it works fine.

I created a medium sceen 30' x 30'.
Tried again and the same issue.
I've got the grid in the Modeling room set to Spacing 1ft and Draw a line every 1.
I create a box thats 1 grid square in size (X,Y & Z) so that should be a 12" x 12" x 12" (1ft x 1ft x 1ft) square based on the grid settings.
In the modeling rooms General tab the size is listed as Width 12ft and Height 12ft same thing in the assembly room.

So it looks like the Grid settings are incorrect in the modeling room when in a "Medium Scene". I dont have the Spacing set to 12ft for the grid....WTF.

My brain hurts.  LOL...