When Webb is climbing up the hill, trying to run away from the police near the end, at one point he slips downward, which would have been the end of him. After a quick cut, it's as though he never slipped (where he would have fallen), and is right back to climbing arduously again.
At the beginning, Susan closes the blind in the bathroom with Webb standing outside. She does not close it all the way, leaving a couple of inches of the glass exposed at the bottom through which Webb's badge
can be seen. In the next shot, from outside, the blind is completely closed.
When Webb drives out of the ghost town to chase the doctor, the image is flipped. This may have been done to use previously shot footage but keep screen movement consistent going to and from the ghost town (i.e., arriving from right to left and departing from left to right). This manipulation is revealed (and the continuity error created) because Webb is seen from the exterior shot sitting on the right side (of a left-hand drive car) as it drives past, but he is sitting on the correct left side in the next shot taken from inside the car in the back seat.
When Webb is climbing up the hill trying to escape the police, he is shot. He is in the middle of nowhere, with no chance of getting away, and is not posing a threat to his pursuers. It is, therefore, puzzling that it was deemed necessary to shoot him since he could most certainly have been captured alive at a later point. It is not clear if he was injured or killed.
Webb's new Cadillac has California plates, but he lives in Nevada.
Webb tells Susan the birth of their baby will increase the ghost town's population by 33-1/3%. The birth actually will increase the population by 50%, because the population will go from two to three.