Sam Mason is in the passenger seat of the Bronco. Jill kicks him in the ankle and jumps out and the Bronco goes down the ravine. Sam is still in the passenger seat and grabs the steering wheel. The next scene has him in the driver's seat, then he's back in the passenger seat. He's in the driver's seat when the Bronco stops.
While travelling on the old trail and then accidentally driving off of it the type of rims on the van change from aftermarket white rims to painted white stock steel rims.
The error mentioned above, about the door being closed when he goes back to the van after opening the stable door - but how do you know that his father hasn't closed it in the meantime, in the 10 seconds or so, while the viewer watches him open the stable door (with the van out of view) and see a clip of the police plane in the sky (with the van out of view).
In the ghost town, when Clint exits the van to open the stable doors, he leaves his door open. When he returns to the van, the door is closed.
There are 15 counties in Arizona; all of them cover large geographic areas. There are not any small counties or small town sheriff offices anywhere in Arizona. All sheriff offices are in metropolitan cities and operations run from there. Only sub-stations and satellite offices are in small towns.