Mrs Morales told Jake she'll stay at the boarding house, but the only boarding house in town was turned into Dr Mike's clinic.
The 1880s US Cavalry did not wear civil war era hats.
Near the 39 min mark, cavalry officer Sgt O'Connor mounts his horse and his right foot cannot find the stirrup.
The fire at the old homestead was out too quickly.
Viewers never find out if Dorothy ever rewrote the biography of Cloud Dancing that she burned to save him from the Army.
Sully is riding bareback. Cloud Dancing is riding with a saddle. Seems like Cloud Dancing would also be riding bareback.