The fisherman on the waterfall gets shot from behind, but the arrow hits him in his chest.
The skeleton man is on a brown horse with a white face, but he also appears on a black horse, and another black horse with a white spot on its forehead.
About 2 minutes into the movie we see a man at a table using a pick-like instrument to clean a vase. The phone rings, he answers and we see the pick but when the camera pulls out he is then using a brush on the vase.
During the time when the team meets up with the indian who discusses the story about Cottonmouth joe if you pay attention to when it shows a close up shot of Casper Van Dien, the scar on his face switches sides several times.
When they are shooting in the forest, the bullets ricochet off the trees and even spark as they bounce off the wood- as if the trees are metallic.
When the Skeleton Man goes into the power plant and confront two guards with machine guns and kills them, when he ram them against the wall, if you watch closely, you can see that the Skeleton Man has legs and is wearing pants.
When Casper Van Dien gets into the semi-truck, the close-up of his face is his character in the woods, not in a truck.