Continuity mistake: The Indian's braids change length and density from his initial meeting with Joe to later scenes.
Continuity mistake: When Joe Dirt and the indian are in the desert and they are playing with the roman candles, Joe Dirt trips on the A-Bomb and the candle stick flies out of his hand. But in the next scene, when he wakes up the candle stick is in his hand again.
Continuity mistake: During Buffalo Bob's first appearance, he's holding a rake with both hands. In the next shot, he's holding it with just one hand.
Other mistake: When the old man gets his foot caught in the railroad switch, the switch closes on his foot, trapping him. As the camera pans out we see that this was not an electric switch but a hand throw switch, meaning that someone had to be standing at the switch manually operating it to close on the old guy's foot.
Character mistake: Joe Dirt mistakenly refers to his 1967 Plymouth GTX as a Road Runner while talking to Jill at the carnival.
Answer: Yes.
T Poston