When Thomas offers Victor money to help get him to Phoenix, his braids change position. In one shot, they are both in front. In the next shot, his right braid is over his shoulder. This repeats several times.
When Thomas walks into the gym, he places the boom box on the floor facing away from basketball court. In the next shot it's turned towards the court.
The old pickup truck that leaves the Joseph house on the reservation has 10-lug rims, and when it is returned by Victor and Thomas, it has 5-lug rims on all 4 wheels. Obviously it's a different truck.
When 12-year-old Victor beats Thomas up right after his dad leaves, he is wearing a white and red shirt under his button-up shirt. After he begins running, the undershirt changes to a completely red muscle-tee.
When Victor drops Thomas off at his home, you can see the shadow of the rear-view mirror, cast on the truck seat. In the next scene, when Victor stops at his home, the mirror is gone but the bracket is there.
There is no way that one bus driver could have driven the same bus continuously from Idaho to Arizona. Federal law would prohibit it.
It is illegal to drive backwards as it's dangerous and the rear shield isn't big enough to watch the road. The girls who drove backwards could've killed Thomas or another person or animal or even so much as crash into another car.
Thomas says that Victor's dad looks like Charles Bronson in Death Wish: The Face of Death (1994), the one where he fights the Asian gang. It is actually an Irish gang in that number.
If Lester Falls Apart the radio station's meteorologist was broken down and stayed at the same crossroad since 1972. It's impossible for him to survive and it's unknown how he got a cell phone to report to the radio DJ since cell phones weren't even a thing in the 1970s.