The physical positioning of the Steptoe's outside toilet varies over the course of the series: sometimes it is plumbed in facing the yard gates, at other times it's rotated to face the wall.
Harold and Albert seem to age at different rates during the entire series run. When the show debuted in 1962, Albert was supposed to be 63 and Harold 37. When the show finished in 1974 Albert was 69 and Harold was only 41.