Deliberate mistake: Steve is not superhuman, but he could see and almost (Diana whips it out of the way first) dodge a bullet at the beginning of the car chase. (01:21:55)
Deliberate mistake: When Diana and Steve visit the Mayan guru hideout, they find an issue of Pro Wrestling Illustrated with Jerry Lawler on the cover. It's the August 1984 issue though, that couldn't be there since it's still early July. The prop department knew what they were doing there though; if you look at the cover, you can see they modified it and it actually says July 1984. (01:29:40)
Answer: The competitors had to light up the cloth banner beacons using their bows and arrows. Diana finished the course but missed one blue beacon by taking the cave shortcut, so the general grabs her and disqualifies her.