Continuity mistake: Steve receives a Rowflux and five containers of protein powder. He takes one of the containers leaving only four still on the floor. In a subsequent scene, Steve is still holding the container but now five containers can be seen behind him, giving him six containers altogether.
Beyond the Alcove or: How I Learned to Stop Worrying and Love Klaus - S17-E7
Continuity mistake: When Francine is arrested for being a menace, one of the police officers does not have a badge over his shirt pocket, but after Francine vanishes in the cloud of smoke, a badge suddenly appears on the shirt. (00:16:35)
The Fast and the Spurious - S17-E13
Continuity mistake: When future Roger announces his upgraded seatbelts, the way some of the double seatbelt straps are crisscrossed changes in following shots. (00:16:55)
Phantom of the Telethon - S4-E7
Continuity mistake: The way Greg holds the volleyball at the start changes instantly. (00:02:00)
Continuity mistake: When Thacker is killed, blood splatters on his campaign posters resting against the couch. When security breaks in and shoots Sturges, the blood on the posters is gone.
The Devil Wears a Lapel Pin - S11-E7
Other mistake: Francine tells Roger that she's jealous that he's starting college, but in the pilot, she mentions that she met Stan in college.
Character mistake: When Francine calls Stan to tell him Hayley is in rehab, he later asks her whose car she crashed, when Francine had never said that a car had been crashed to begin with.
The Life and Times of Stan Smith - S12-E15
Character mistake: Klaus tells Steve how he can take him to ASU and introduce him to some choice people. Steve replies "I don't know, isn't that a party school?" and acts like he doesn't want to attend. However, in an earlier episode "A Nice Night for a Drive", Klaus tells Stan that Steve is hoping to attend ASU because of "sluts on campus."
Continuity mistake: We see an old lady shoot a yellow arrow at Roger's golf bag. The shot changes and when we see the arrow again it is red. (00:09:35)
Phantom of the Telethon - S4-E7
Continuity mistake: When Stan comes in and says that Bullock loved his telethon idea, Roger goes from holding his wine glass to having his arms crossed depending on the shot. (00:06:30)
Phantom of the Telethon - S4-E7
Continuity mistake: After Roger gets his organ, we see Stan by the totals display. However, the donations jump from 382,760 to 382,840 between camera cuts. When we see the donations rise normally, you see the figures morph into the new ones. This doesn't happen on this occasion. (00:10:00)
Factual error: Klaus shoots 25 rounds out of a pistol. Given the size of the pistol, that many rounds would require an extended magazine, but it's a normal magazine that isn't extended.
Chosen answer: It is just the decision of the creators to do so.
MasterOfAll