Continuity mistake: The Bride cuts off both of Sophie's arms, but when she throws her into the hospital, she has one arm. (This mistake is only seen in the extended Japanese version of the film - in other versions only one arm is cut off).
Continuity mistake: Tanaka's severed head lands on the table and stops rolling, meaning it should stop moving. However, it then falls off the table.
Answer: Bill used Hattari Hanzo's teachings for evil, instead of belief and self defense.