Other mistake: When Tommy Lee Jones calls up the asset as he lands in Las Vegas you can see him holding the mobile phone upside down with the camera near his mouth and microphone up.
Other mistake: Colin Salmon in Box Command introduces himself to Banning as Chief Inspector. However, the rank on his shirt is of a Commander rank.
Other mistake: In the Watertown police shootout scene, a resident tosses a sledgehammer to the police to help them in the fight. Right when the resident throws the sledgehammer from their front door, many frames are entirely missing from the movie for some reason, which results in an awkward skip. This is seen in all cuts of the film (Blu-Ray, Digital, etc).
Other mistake: Merrit claims he has never ridden a motorcycle and talks about how unsafe it is, but is seen riding one in the first film.
Other mistake: Misty's car at the beginning of the movie crashes into the house presumably breaking through the perimeter wall, certainly does smash through interior walls and furniture, but in the living room it still has every single light, including the side ones, completely whole and undamaged.
Other mistake: During the scene when Jack's wife is ordering at McDonald's, the little girls are mouthing the lines as the others are saying them.
Other mistake: At the very start, Vee opens Chrome but the window that appears is Safari. (00:00:50)
Other mistake: The time on Jin-hee's phone is 1:56PM when she gets a text from Yong-guk. But later on, when Yong-guk calls Jin-hee's phone and Yon-suk breaks it when attempting to get into the zombie-free car, the time is 3:31PM. Only a handful of minutes passed in between these scenes. There's no way over an hour and a half could have passed. (01:03:25 - 01:09:47)