Continuity mistake: When Ulysses S. "Griffin" is chugging beer with Robert E. Lee, Ulysses wins. When he says "How's that Robert E. Lee," he puts the beer glass on his head. After Robert says, "Okay no more slaves, but we still don't have to read books," the glass is in Ulysses' hand. In the next shot it's on his head again. (00:10:05)
Continuity mistake: After Mayor West enjoys eating the taffy, when it cuts to the Griffin family standing on their lawn, the post-mounted mailbox is placed on the right side of the front door's walkway, but then it switches to the left side of the walkway. (00:08:27)
Continuity mistake: When Peter is singing, he stops and starts dancing. Mr Weed is directly behind him, then in the next shot of other people dancing, he is with them. Then in the next shot, he is behind Peter again. (00:11:35)
Continuity mistake: During the meeting at the end, there are 13 Generals standing behind Adam West. In every other shot afterwards, they are standing behind Peter or Joe. (00:20:35)
Continuity mistake: After La Toya Jackson says the prayer in Mayor West's office, the military personnel that were behind Mayor West vanish in the next shot. (00:20:55)
Continuity mistake: At the pool party with the other world leaders in Joe's pool, Achmed is cooking on the grill and Stewie is standing on a blue stool next to him. Moments later, in a closer shot of Achmed, the stool Stewie is on is suddenly brown with grey legs. (00:18:18 - 00:18:58)
Continuity mistake: In the kitchen after Petoria is cut off from the world, the fridge is shown with two notes on the freezer door next to the handle with scribbled writing on them. After Stewie takes a dump in his newspaper diaper, it cuts to a different closer angle, and now the writing on the notes has vanished. Usually in animation, details being lost in a further out shot is normal; however, this is details lost in a closer angle. (00:17:42)
Continuity mistake: When Chris tells Peter that some guy won't let him go to school, Peter turns so that his front doorway threshold is to his right. But then, when it cuts to the next shot with Peter asking "him and what army?", suddenly his back is to the doorway again. (00:14:07)
Continuity mistake: In the UN Cafeteria, Peter goes to sit down next to some other world leaders for lunch. Between shots, the size and shape of the food trays change, and also the Asian guy's tray vanishes altogether. (00:12:50)
Continuity mistake: After Robert E. Lee loses the drinking contest to Griffin, he sets his mug down and it is under half full. In the next shot, suddenly it's about three-quarters full. (00:10:08)
Continuity mistake: In the Ulysses S. "Griffin" cutaway gag, just when Griffin and Lee go to start chugging their beer, the soldier behind Griffin suddenly goes from brown hair to blonde. The soldiers also get closer together between shots. (00:10:04)
Continuity mistake: Peter enters Adam West's office, and the words "Adam West Mayor" are on the door. Adam West then tackles Peter to the ground and starts punching him in the next shot. During that moment, part of the letters are still seen, and the "OR" at the end of "MAYOR" is noticeably much smaller, and the "R" is a different shape. (00:06:45)
Continuity mistake: After the IRS visit, Peter is digging a hole in his back yard for a pool. His kids are standing around at the edge of the hole watching. When it cuts to a close-up of Stewie, he's suddenly standing much closer to the hole. (00:04:18)
Continuity mistake: When Peter sits down at the desk in the IRS office, there is a pen and what appears to be a business card on the corner of the desk next to where he’s sitting. After Miss Stratford says she farted, it cuts to a frontal angle of Peter, and suddenly the pen and business card have disappeared. (00:03:07)
Continuity mistake: When Peter walks in the front door with his tax refund, he does not shut the door after approaching the family on the couch. Yet moments later, when Peter goes to sit down, the door has shut all by itself. (00:02:34)
Continuity mistake: In the first shot of the pool party, Peter's "President" sash is draped from his left shoulder with the visible letters "n" and "t" in reversed positions. In the following shots the sash is draped correctly from Peter's right shoulder.
Continuity mistake: At the IRS, when Peter walks into Stratford's office there is no light switch beside the doorway, but a 3-gang rocker light switch appears in following shots. (00:03:02)
Continuity mistake: While Peter is with Mayor West at Town Hall, when Peter winds up in the trap door, the doorknob on West's office door changes sides (so the door opens the opposite way) and the plant moves away from the corner. (00:07:41)
Continuity mistake: When Peter's great-great uncle, Ulysses S. Griffin, is with Robert E. Lee, all the Confederate soldiers have their straps over their left shoulders, and note the buttons on their uniform coats. However, in the closeup two soldiers have their straps over their right shoulders, and the buttons are on the opposite side of their uniform coats.
Continuity mistake: Just before Adam West opens the trapdoor under Peter, Peter moves further away from the desk between shots. (00:07:20)





Suggested correction: Quagmire considers the rest of them to be his best friends. He isn't drinking because they can't drink. He is complaining because since his friends can't drink - he won't drink, so he is still pissed.
It's still a plot hole considering Quagmire's age. I think the writers messed up big time.
You make a good point, but it's awkward to be that one person who is drinking while surrounded by people who can't. So, I understand the correction that was submitted above. Because his friends are not drinking, he now feels that he can't.
It's 100% a mistake. Quagmire simply would buy them alcohol the same way Brian did when they realized he could.
ctown28 ★