Character mistake: In the scene where the news helicopter comes in close to the building and causes high winds that almost blow 'Joe Walker' off the ledge, Detective Lydia Mercer calls him "Nick". She doesn't know his real name at this point. (00:38:30)
Character mistake: In the scene where Carlisle returns with Alistair he asks Edward how many vampires showed up, Edward replies 18. At that point there were only 16. Vladimir and Stefan arrive a few scenes later and are part of the group assembled for battle that totals 18 of the witness vampires.
Character mistake: In the closing credits, as the camera pans across the Star Wars figures on the shelf, you can see the sandperson figure is in the spot labelled Jawa and vice versa for the actual Jawa. (01:50:15)
Character mistake: When Francis Allen is being interviewed by Reagan, Allen presents Reagan cell phone pictures of himself on a yacht to support his alibi. Allen says "the time and date are on the top of the screen, you saw that, didn't you Reagan?" and Reagan agrees. However the date is seen at the bottom of the screen, not the top.
Character mistake: When John meets his clone in the rundown house he lives in, the clone has a British accent and tells him his story. John has an American accent. When the real John tells him "I'm not like you, I had a wife, a family, a daughter" he mistakenly uses a British accent.
Character mistake: When Dracula puts Johnny on a time-out, it is shown that Dracula has the ability of psychokinesis. Yet during the scene when Mavis visits the human village, when one of the dressed up zombies loses its head, Dracula jumps into the scene to physically put the head back to its body, further risking being spotted by Mavis, which he wanted to avoid. (00:16:15)
Suggested correction: Using this power would also be a risk of Mavis finding out because his magic has blue effects around which she would spot.
I doubt that, she was facing the opposite direction of the headless zombie the entire time, and the zombie didn't stand too close to her. However, I have realised that the magic does seem to make sound, and the headless zombie did stand close enough to Mavis for her to would have heard Dracula's magic if he were to have used it.
Even with the sound, I doubt she would have noticed when there are what looks like villagers approaching her with pitchforks and torches.
Character mistake: In the news article where it shows how his daughter died, daughter is spelled "Daugher".
Character mistake: When Michael goes to the antique shop, the sign out front is spelled wrong; it reads "anitques."
Character mistake: It's said in the movie a vice presidential candidate never gave a concession speech. Geraldine Ferraro did this in 1984.