No this has been posted before. Treyarch used the same map as nightfire. They rushed and left some things out.
yea i know that is why the "mystery stairs" are there. But think about it, the map for nightfire didnt have openings that showed windows and doors, treyarch had to put that in on their own for der riese . so why would they put an opening where there isnt a window or a door? im not disagreeing with your statement but that does not relate to doors and windows, it relates to the actual map, such as staircases.