During the runaway wagon scene, the girl's position as she prepares to jump changes back and forth, from perched on the edge of the wagon with one leg outside (in long shots) to being completely inside the wagon in close shots).
After Paul Cable killed a man and sent his family back to the house, before the camera cut away the dead man moved his head as he began to get up. postscript - The man raising his head was the one pistol whipped, not the one who was shot dead.
Paul Cable uses a Richards conversion of the Colt 1860 Army revolver, and is shown shooting and reloading the revolver with cartridges. The story is set in 1865 at the close of the US Civil War, but the Richards conversion was not introduced until 1873. However, while factory made cartridge conversions may not have been readily available until this time, the movie takes efforts to address this by having Paul Cable's wife and father-in-law working on cartridge converted pistols in their workshop. This occurs early in the movie, with Cable's wife telling a young cowboy about the modifications that had been made to his Colt percussion revolver, which includes a cartridge converted cylinder and ejector rod. An allusion is also made to the fact that Cable's wife had done similar work on Cable's own revolver.