Two mapping errors - the wall next to the toilet should be one tile higher. The wall behind the wardrobe in the bedroom is cut short as well. To fix the first put another wall tile above the other. To fix the second put a wall tile behind the top of the wardrobe, then find the wardrobe tile in the B-E tiles and use that over it (the issue came about from copying the wardrobe tile from another map or something and pasting it over the top of the wall).