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)
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)
Factual error: Steve and Roger make a prank phone call to Tony Blair at 4:30 AM GMT during sunset in Virginia (EST/EDT); because of the 5-hour time difference (4 hours during Daylight Savings), it would be 11:30 PM or 12:30 AM in Virginia, which would be nighttime.
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)
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)
Roger Codger - S1-E6
Continuity mistake: The amount/position of the grenades thrown into the Area 51 lab change between shots. (00:11:30)
Audio problem: Roger finds the Jack In The Box man. The Jack In The Box man starts screaming and then Roger screams and runs out the door. When this happens, the Jack In The Box man sounds like Roger and Roger sounds like Stan. (00:12:30)
Chosen answer: It is just the decision of the creators to do so.
MasterOfAll