Continuity mistake: When Sadusky has Ben handcuffed across the desk from him, there is nothing on the desk directly between Sadusky and Ben except Sadusky's coffee mug, a gray thing that is about mid-way between Ben and Sadusky, and a white spiral notebook to the right of the coffee mug. Then Ben says, "Ian still ended up with the Declaration of Independence," and as the shot switches from Ben to Sadusky saying, "Because of you," we see the glasses Ben found at Independence Hall appear on the desk in front of Sadusky between the gray thing and himself. Then as Sadusky says, "Someone's got to go to prison, Ben," and Ben says, "Yeah," two short stacks of papers appear on the desk in front of Sadusky and the glasses changes position as well.Sheri Hartman
Continuity mistake: This concerns National Treasure 1 and 2. In the first film, when Ben's grandfather tells Ben the story about the clue given to Thomas Gates, he says he was the grandfather's grandfather's, grandfather - Ben's Great, great, great, great grandfather. In the film, in 1832, he appears very young, maybe early 20s. But in the second film Thomas Gates, Ben's Great, great grandfather, appears to be 40-50 in 1865. A young man in 1832 can't have a middle aged grandson in 1865.
Continuity mistake: When Riley is cutting into the pipe holding the cable for the National Archives, the hole he cuts changes shape after the shot showing him examining the wires. (00:31:35)
Factual error: In the scene under Trinity Church, Ben is holding on to the elevator and trying to get a grip to swing to safety (after Dr. Chase is already to safety). He grabs a board that falls off, then the last board pulls back an is shown to be held on with modern day nails. If it were built 200 years before, as the movie suggests, these would not likely be the kind of nails from the local hardware store as shown in the film.
Factual error: The ropes under Trinity Church are all shiny and new looking. These ropes would most likely be rotten and not able to hold up the massive chandelier or be supportive for the dumbwaiter system.
Continuity mistake: When Ben is trying to pay cash for the 'replica' of the Declaration of Independence in the Gift Shop, he lays his wallet down on the counter and starts counting out bills and change right next to his wallet on the counter. A few scenes later, when the FBI is reviewing surveillance tapes, one of the monitors shows Ben reaching in his pocket, pulling out his wallet and grabbing the money that is out on the counter. This happens when the over voice says, "Charge. Benjamin Gates."Sheri Hartman
Continuity mistake: In the catacombs under Trinity Church, the lift Ben and Abigail are standing on falls. When it jerks to a stop, Abigail falls and Ben catches her. The lift is stationary at an angle. However, in the next shot, the lift is swinging forwards, allowing Ben to throw Abigail to safety. (01:40:00)KatieLou
Factual error: When Riley is sitting outside the Franklin Institute and sees the ad on the side of the bus with the close up of the Liberty Bell, the SEPTA bus is labeled with the 108 Airport route. That bus route goes from the 69th Street Transportation Center to the Philadelphia International Airport and would not pass near the Franklin Institute.
Visible crew/equipment: Three times you can see lens flare as the camera is pointing towards the sun: the airborne-shot of the Jefferson Memorial (in this one you can even see a part of the airplane or something else in the lower left corner), the Philadelphia skyline as they drive into Philadelphia, and the view from the "target location" of the shadow of the cross (near the brick containing the glasses) towards the steeple with the bell.
Other mistake: In the scene where Ben, Riley, and Abigail arrive at Patrick's house, the location title at the bottom of the screen says, "Philadelphia, PA." Then, as the Declaration of Independence is being examined, Patrick says that he donated the Silence Dogood letters to "The Franklin Institute in Philadelphia." Finally, as the scene ends, Ben, Riley, and Abigail are in Patrick's car, driving through the night towards Philadelphia. (00:55:55 - 01:04:15)eraujames
Other mistake: When Ben enters the Gala dressed in overalls and tool belt, he enters a door across the street from where Riley is parked. There is a security guard outside that door who waves Ben on into the building. As Ben exits that same door, there is no security guard, which seems hard to believe with such a big event.Sheri Hartman
Revealing mistake: When the stairs built on the walls of the dumbwaiter shaft start to collapse, Riley makes a jump onto a stable one. In the first shot of him jumping you can see a thick stunt wire attached to the back of his shirt. (01:43:35)
Continuity mistake: When Ian looks down to the shadow cast by the "House of Pass and Stow", the shadow isn't anywhere near to where it was when Ben looked down, although not very much time could have elapsed.