Outside Dormer Material Changing when Interior Changes are Made

[jpmtss]

I am unsure what is causing this or how to correct. Before I apply any colors into the upstairs, the dormers look file. The outside siding goes all the way to the roof line. As soon as I apply a color to any of the rooms, the attached picture is what happens. Even if I explode the dormer, I cannot change this. Any help would be appreciated. Thank you!