Post stadium scene, after a foot chase and shootout, Frost places his gun against Weston's left ear as Weston is slumped in an alley. Frost fires his pistol beside Weston's ear into the brick wall behind him, presumably rupturing his eardrum as Weston slumps over and cusps it. Later in a restroom, Weston is treating his wounds and bleeding eardrum, but it's his right ear.
When Wade and Frost crash after being hit by a black S.U.V. the road that they are pushed into is in full shade. Yet when their pursuers reach the crash site the road is in full sunlight and the positions of all three vehicles have changed.
In the shootout scene amongst the shipping containers, when Matt Weston jumps out of his truck and fires his first shot, the slide locks back on his gun, showing either a malfunction or that it's empty. Yet a moment later, he's shooting again.
During the car chase to the consulate, Linklater says he is on Albert Road in Woodstock. Aerial shots back this up, but seconds later a gunfight ensues around a traffic circle back in the CBD, about 7km away from Albert Road.
When Weston enters the safe house for the first time he opens the fridge and there is a stock supply of O positive blood. If this is for transfusion in an emergency then O negative is the universal donor.
The goof item below may give away important plot points.
When Linklater pulls up behind Barlow, the driver's door on Barlow's vehicle is open, and when we see him from the passenger side, it is open. But after he shoots Linklater, we see from the outside again that the door is closed.