The location of the cellar of the burned house is very different to that of the house prior to the burning - different trees and vegetation and topography.
When McIntire is captured by Union soldiers on his return, his jacket shows no sign of the bullet hole where he was shot nor of any damage to the jacket.
When McIntire is captured and returned to the Union Army, the soldier on the right (who is holding him at gunpoint) is using an old relic rifle which is missing a hammer, thus it is not capable of firing.
10 minutes into the film, in an overhead shot of the soldiers' camp, a white pickup truck can be spotted in the background.