Continuity mistake: In the opening titles (for series 1-3), Stan runs outside and picks up a newspaper. He reads the headline and throws it back on the ground. But by the time Stan drives off, the newspaper has disappeared. (00:00:10)
Continuity mistake: The window partway up the Smith staircase vanishes after the first season.
Continuity mistake: The vent-hood in the kitchen above the stove/island is always disappearing and reappearing. Sometimes it's there, sometimes it's not. The handles on the fridge/freezer also keep changing sides. Sometimes they are on the left, sometimes they are on the right. And the living room is always changing sizes. Sometimes they open the front door and the couch is right there, and sometimes it's several feet away from the front door.
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)
Continuity mistake: When Hayley closes the van door, Stan and the animals suddenly get a lot closer to the van. (00:08:40)
Roger Codger - S1-E6
Continuity mistake: Roger oozes gunge on the couch. Some of the gunge goes on the blanket on top of the couch, but when Stan flips the couch cushion, the gunge from the blanket suddenly disappears. (00:03:25)
Roger Codger - S1-E6
Continuity mistake: Just as Bullock rings the doorbell, Roger oozes gunge from the left side and right side of his torso. The gunge from the right side goes on the couch and the left side goes off screen in a direction towards the door. Yet when Stan answers the door, no gunge is visible on the floor anywhere. (00:03:25)
Roger Codger - S1-E6
Continuity mistake: Steve, Hayley and Francine all stand next to the door when Bullock arrives. They are all standing right next to the door in the shot where Stan adjusts their clothes. But they suddenly move a couple feet away from the door in the following shot where Stan opens the door. (00:03:45)
Roger Codger - S1-E6
Continuity mistake: During Francine and Hayley's conversation with Father Donovan, Donovan's phone is directly in front of him. When Francine says "Roger was good", the phone has suddenly moved closer to the golf clubs. (00:08:50 - 00:09:30)
Roger Codger - S1-E6
Continuity mistake: When the bus driver finds Roger, the Dignity Towers Retirement Home bus is only a few feet away from them. But in the shot where Roger says "How do I get home? How do I get home?", there was no sign of any bus for many many meters. As if the bus just appeared out of nowhere. (00:09:45)
Roger Codger - S1-E6
Continuity mistake: In the Area 51 flashback, the "RESTRICTED" sign on the lab door goes from red to blue between shots. (00:11:00)
Roger Codger - S1-E6
Continuity mistake: The amount/position of the grenades thrown into the Area 51 lab change between shots. (00:11:30)
Roger Codger - S1-E6
Continuity mistake: When Francine is telling the kids heaven isn't real the brown chair normally seen isn't there. But in the close up shot of her, the top of the brown chair can be seen behind her. It's gone in the next shot though.
Continuity mistake: In the scene where Francine says she used to be friends with everyone in the block, there is a cutaway of a previous neighbor couple called the McLearys. After the cutaway, keep an eye on Francine's coffee mug. The mug keeps changing position on the table between shots. (00:02:10)
Continuity mistake: When Stan leaves the scout rangers, standing behind the door are Steve and Joey the scout. The next shot shows only Joey standing behind the door. (00:04:40)
Deacon Stan, Jesus Man - S1-E8
Continuity mistake: When Steve says "Thank you, Satan" to Karl Rove, his eyes are part closed, mainly open. In the following shot afterwards, his eyes are wide open. (00:08:20)
Continuity mistake: The way the glass is shattered keeps changing between shots when Bullock jumps out of the diner window. (00:19:35)
Continuity mistake: After Steve accidentally jabs the wood burner into Stan's penis, he screams and a avalanche occurs. Then when Stan screams a second time due to putting the cream on his penis, the avalanche happens again but the same amount of snow is on the mountain even after a load already fell off it. (00:06:40 - 00:07:30)
Continuity mistake: When the avalanche happens the second time, all of the animals have snow on their backs. In the shot of all three of the animals, the snow has disappeared. (00:07:30)
Chosen answer: It is just the decision of the creators to do so.
MasterOfAll