Other mistake: The intro is capped by something supposedly cool but hilarious for the wrong reasons; Kirsten Stewart gets thrown off the top of a building (just for funzies) by her colleague; she emerges though a few seconds later, barefoot on the landing skid of a helicopter. Besides praising her luck for not getting chopped by the blades, the quality of the CGI of the helicopter is low, and while it's a movie cliche to have helicopters definitely quieter than their RL counterparts, here it's strikingly absurd; a helicopter a few meters away from a skyscraper would have not just alerted the baddies, but rattled every window and cutlery on the table; here they make just barely enough wind to puff the curtains leaving undisturbed Tang's hair and Patrick Stewart's jacket.
Other mistake: The Angels do a clean sweep of all the bad guys, tie them up and put their heads in bags. It's kind of a plot point that they have all the baddies perfectly packed up and ready for delivery. However when Bosley makes his entrance, there's a guy in the elevator he leaves behind, the door closes and nobody 'bags' and/or ties him up. He's just unaccounted for. (00:05:10)
