I am designing a 2 story house. A portion of the living space on the 1st floor will be open to the 2nd floor ceiling. I am having difficulty getting the walls to not show the break between floors. I can see the break where the interior finish, (drywall, insulation, etc.) starts and stops between floors. I have tried to change the wall height in that room which fixes the interior finish break but, the room specifications want to add a floor above the 2nd floor ceiling.