In your new model, I opened just one component for editing, and there are now multiple floors in it:
All the the floors, and the vertical and slanted profiles of the corners, are connected loose geometry inside the Roofscape Floor Planes 01 component, rather than one component per floor.
That may be fine but it does make editing harder, as all the floors are connected. If you move anything in one, it will move something else that you might not want to move.
If you intend to develop the model further, with (for example) interior detailing on each floor, you would probably be better advised to make each floor (top, bottom and sides) into a single component, inside the overall building component. Then (perhaps) one component for the corner outlining. Or if developed further, a separate component or components for the walls of each floor, another component or components for interior walls, separate ones for furniture, etc.