Other mistake: In the aerial shots of the semis being driven in the mall parking lot, the zombies are milling about. Notice they have left a path just clear enough for the truck. (01:02:40)
Other mistake: When the bad guys are taking the cash from the vault, they finish with just 3 duffel bags. Yet there are blocks of cash along all the walls, roughly 25 times as big as what they're taking. With the duffel bags supposedly containing $100 million, there would be tens of billions of dollars for the taking. Their escape route is up the elevator to the roof, and into a helicopter. What bad guys wouldn't take all they could carry?
Other mistake: The suit jackets that Buddy and JP Richardson were wearing at the last concert had to have been sewn incorrectly, especially the sleeves. The seam at the top of the sleeve caused bunching all the way down the sleeve. Buddy's jacket looked like it was buttoned incorrectly at the top, but it was probably also a sewing mishap and poor fitting. So, the way the jackets were sewn was one big mistake (or wardrobe malfunction). (01:40:44)
Other mistake: During the denouement, there is a scene with the meeting between Simon and Jacqueline inside the doctor's cabin. Jackie opens the doctor's case where he keeps the surgical tools pulling it out from a drawer, and she does not place the box back in the drawer or closes it; we see the whole time she spends inside the cabin, so it'd be impossible for the doctor not to notice what happened. (02:08:25)