To get to the bathroom, Al walks through the door behind the closet, then turns right to get into the bathroom. However, taking into account the layout of the living room and the front door, if Al turns right to get into the bathroom, the bathroom would have to be on the front porch.
At 12 minutes, as Peggy walks in the front door a crew member's shadow moves across the couch, when no other characters are supposed to be in the living room apart from the ones on camera.