Each time the front of the Brady house is shown as though it were "evening", the same shot is used for "daytime". The evening shot of the house is only darkened. The same shadow that can be seen in the daytime shot in the lower right corner (caused by the roof) is seen on the evening shot.
In episode, The Brady Bunch: What Goes Up... (1970), where the family attempts to cure Bobby's fear of heights by getting a trampoline, Mrs. Brady first spoke to Christopher Knight, (Peter Brady) "Go get 'em, Chris!." Later on, Greg spoke to Jan, acted by Eve Plumb, saying "Why don't you give it a try, Eve?."
In episode The Brady Bunch: Click (1971) when Greg (Barry Williams) is playing football and cracks his rib, he is wearing a different uniform and helmet than either of the two teams that are scrimmaging in the footage.
First episode when Greg wants to have his own room, The Brady Bunch: Our Son, the Man (1971) Carol suggested the attic. Mike laughed, saying that it would work if Greg was only two feet tall, obviously pointing out that the head room is way too short. Later on, starting with The Brady Bunch: A Room at the Top (1973), the attic is shown with more than enough room for someone to move around in.