When the crew sights the island, three of them are looking at it straight ahead while the fourth (Benny) is looking off to his right.
In at least one of the scenes where the crew shoots some of the Hairy Men, several of the latter clutch at their wounds in the wrong place and at the wrong direction from where the bullets would had to have struck them.
When the crew abandons their downed plane in the ocean and paddles away in their raft, one man can still be seen standing at the top right of the aircraft.
Steve tells Sandra to have her women stay at their temple, where he says they'll be safe because the Hairy Men don't know its location, and that he and his men will meet them there later. But neither Steve nor any of his crew has ever seen the temple either, so how would they know where to go?