Continuity mistake: Bloodsport is talking to his daughter about her crime. During the conversation, the continuity between shot and reverse gets jumpy at times; for instance when he mentions that she "dragged out the paternity test" Idris Elba stretches out his arm only to be still when his daughter screams at him. Later on he reminds her he told her to do 'her thing' and gesticulates with the right hand, but his arm is still and low in the next shot. (00:00:17 - 00:16:50)
Factual error: During the briefing, Waller shows the map of the island of Corto Maltese. The map positions the fictional island in the Caribbean (it says "Mar Caribe"), but she says it is "off the coast of South America." The map does have also a set of precise coordinates in one of the middle quadrants; 45°43'36.0"S 56°32'58.2"W, which would place it far west of Argentina, surely nowhere near "Mar Caribe." (00:22:10)
Continuity mistake: When Amanda Waller orders the blonde subordinate to "Open it", the digital clocks show the same times shown minutes earlier when they had yet to wake up, contact them, talk to them, order them to retreat, witness their change of mind. All of which certainly took longer than a minute. (01:46:45 - 01:49:35)
Continuity mistake: After Waller issued her order to leave Corto Maltese to its fate, Bloodsport turns his back to Starro that is wrecking the city and walks towards the camera. Just a moment before the cut, Margo Robbie is shrugging, a gesture that is supposed to happen in the next shot, and she in fact repeats it in the next shot a second later. (01:48:30)
Continuity mistake: The Corto Maltese Army is storming the pleasure district. As the camera pans from the club doors to the incoming vehicles, to the far left there's a john wearing a brown suit posing one-handed in front of a girl. In the wide shot from behind the trucks, you can see that a soldier pushes the guy back to the wall. But as their commander gets off the hum-vee and yells to search everywhere, the guy is standing in the corner, and at the next cut he's back against the wall. (01:01:45)
Deliberate mistake: When King Shark grabs the guard from behind and eats him, he screams loudly, but nobody reacts to it, not even his buddy who just went left to fetch a drink. Later Cena and Elba kill 'silently' every other guard, but when they get to a group of three that Bloodsport yo-yos to death, it's pretty impossible that those three could have missed the carnage just a little off to the left. Then again, at the end a whole tower gets demolished without anyone noticing, so It'has to be deliberate. (00:33:05)
Other mistake: Beach scene; by the clocks in the control room it's supposed to be just before or at most past midnight (22:52 in Florida, presumably). Explosions nearby, barely past the thick of vegetation, but the team instantly goes to sleep as if they were anyplace safe. To make it more absurd, they awaken in the 'middle of the night' when Polka-Dot Man relieves himself and King Shark tries to eat the rat lady. Cut to the control room, and it's 23:53. It's as if they did not try to move any distance at all. (00:12:35 - 00:29:40)
Other mistake: Bloodsport and the others see the explosions Harley is running from, which are less than a couple miles off. The beach itself should already be lit by the explosions and burning wreckage, which the team couldn't fail noticing as they were approaching. To make the distances more ludicrous, when we see Flag's signal in the control room it's said he's "1 mile north" of them, He's already halfway towards the western isthmus. No reason why it'd take them a whole day to make it to their destination.