Other mistake: At one stage the Angels speak with each other in a different language, so that the people sitting next to them wouldn't understand. Having listened to it for a few times, I realized it was Finnish. Funny though, the thing they actually said there (in Finnish), was totally different than the written translation. (00:41:45)
Other mistake: When Knox shoots at Dylan/the glass, if you look closely, you can see the first shot hits the glass just past the left side of her head (on the viewer's right) but when they slow mo it down, suddenly the bullet is on the left side and shoots the glass just above her right shoulder as she propels herself back.
Other mistake: At the beginning of the movie the bomb is revealed to have 58 seconds left, but actually explodes after about 68 seconds. (00:02:40 - 00:03:50)