Continuity: In the Winslow's, home guests would always walk out the front door and then to the left, but in the picture that is shown as the Winslow's home there is no walkway to the left. There are a few stairs outside that lead up to the front door, but walking to the left after exiting through the front door would only lead you into a wall.
Continuity: In the first episode, outside of the front door is a little hallway leading out side. From the second episode on, the hallway was a porch.