In the woodcutter's story after the bandit's final attack on the Samurai and the wife screams; when the Bandit falls down near the Wife there is a considerable gap between them. However in the next immediate cut which is a two-shot; the orientation of the bandit's body changes and he is now closer to her with his right hand practically touching her right knee.
At the beginning of the film when the woodcutter finds the dead body, the arms and hands are stiff and raised. However; you can see both arms slightly moving. Apparently, they used a real person, and the actor playing the dead person was unable to keep the arms perfectly still.
Around the 22:30 mark (in the Criterion release), the bandit explains to the husband about the sword and where it came from, but the words don't even come close to matching his lip movements.