(at around 23 mins) Elisa is sharpening the doll's knife. Her hand movement is all wrong, she first slides the edge along the whetstone for sharpening and then turns the edge against it just scratching the stone making the blade duller again.
(at around 35 mins) Elisa is tapping the keys on her typewriter. Clacking of the keys is heard, but the carriage is not moving.