Other mistake: When Hamby was pushing Joey into the hole, he shoved him with his left hand near the middle of Joey's upper chest. Joey was falling backwards, as would be expected, but his feet "somehow" landed on the outer edge of the hole that was about 2' behind him and he "somehow" started falling upright, landing on his feet at the bottom of the hole. The way he was pushed and his proximity to the hole should have resulted in Joey's upper body landing on the opposite of the hole - and not falling in.
Other mistake: Matt told Joey that they could not go back to see if the guard was OK in the hole because as soon as Ms. Dillard gets home she will know she was robbed and will call the police. Joey's act - breaking into a house with the intent to commit theft - is more accurately classified as a burglary, not robbery.
Other mistake: In the opening scene where Joey is breaking into Ms. Dillard's house, he quickly smashed a window with his flashlight and immediately crawled through the window - without checking to see if shattered glass fragments were still in or around the frame. Despite his carelessness, he did not even get a cut on his hands or elsewhere, which would be almost impossible under the circumstances.