Alaskan_Son

I was/am having issues with all room heights on floor 1 changing when I change the height of "one" room. After reading where others had the same issue because of the second floor being designated as "attic", I deleted the second floor and rebuilt the second floor as a blank plan. After drawing the walls for the bonus room over the garage, I cannot select to bonus room to open its definition. All walls are connected to form a room. Thoughts?