Choctaw and other goofs
1) When discussing the origin of the totem, the native American says that the Choctaw could not have built it, as there was no wood or granite on the Great Plains.
Who cares? The Choctaw lived in Alabama.
2) Apparently the "barrier" was circular, centered on the cemetary? If so, then it was real small, as shown by the scene where the girl walks into the barrier, with the gravestones ONLY 2 METRES AWAY!!.