Continuity mistake: When Francine is placing a breakfast plate on the table, the arrow on the fridge's temperature dial is pointed to the middle of the yellow. Two shots later, the arrow is pointed to edge of the blue and yellow. (00:00:50)
Continuity mistake: In the pilot episode, during the breakfast scene, there are five donuts in the box in front of Roger before his chair breaks. When he takes one from the box, there are eight. When Francine takes his donut away, there are five in the box again. (00:03:20 - 00:03:50)
Chosen answer: It is just the decision of the creators to do so.
MasterOfAll