What you're saying is true, but it also depends how you look at it. In this one, it shows only the top of the building, so the bottom line of it is not actually the bottom of the building, but the bottom of the view. hence the shape of the windows. It also plays a bit with imagination I think since you cannot distinguish the right perspective which also makes it less "obvious", but I'll work on it and see how it looks like with the right perspective.