Continuity mistake: While at Dino Stop, Katie convinces her dad not to play it safe and to take a chance to save the world. Rick agrees and extends his left hand for the "all hands, Mitchell family on three." In the closeup we see Katie put in her right hand, but in the wide shot Katie's left hand pulls out. Also, note that in the closeup both Katie's and Aaron's positions between their parents are switched. (00:45:00)
Character mistake: The woman with the AK-47 doesn't have the covers on the red dot optic open. In other words, she can't see her target.
Continuity mistake: When Jang and Tiger are talking at the poker game, Jang points a gun at Tiger and is the gun seen pressing against Tiger's forehead. In the next shot, the gun is suddenly a few inches away from Tiger's forehead. (00:18:40)
Continuity mistake: After Silas is killed, in the wide shot Cyborg is standing mostly upright in front of Flash. Cut to a closer shot and he's bent over. (02:51:45)
Visible crew/equipment: Waller is telling "Task Force X" about the additional mission they need to pursue, saving Rick Flag. Watch the shot when Bloodsport repeats "Rick Flag?" and Waller replies "I know." The team is going through dense, uninhabited tropical jungle, but in the trees there are people in T-shirts just standing around looking at them. (00:31:50)