It does kind of have a Goshen/Midland look to it, but Missouri (even western Mo) is pretty far from their homeland. That twist or beveling probably repaired the impact fracture when it hit bone in some ancient species of bison. I'm not sure they beveled much either, they normally just sacrificed length/width and kept the point strait.
I'd love to see a side shot when you get a chance. Maybe Neanderthal will clear up the typology question for us.