When Noah is seen from behind at the family cemetery, the cemetery and Noah are in full shade, but when the camera is facing Noah, the cemetery and Noah are in full sunlight.
After Monty returns to Oak Hill, the number and location of bruises on his face changes from scene to scene.
About 1:13 a car can be seen driving by on the road up in the hills above.
At about 21 minutes in, Ernest turns to his right and you can see his hearing aid in his left ear.
(at around 42 mins) Modern buildings and a truck in the background for the duration of the scene.