When Shelby is in the kitchen cooking, she walks to the island bench and starts cutting a carrot. She chops the carrot once to remove the end of the carrot and moves that piece to the side. She then continues cutting. The screen moves to Shelby's face and you can hear 5 distinct chops of the carrot but when the camera looks back down to the knife as she sits it down to investigate the noise, there is only 3 pieces of carrot attached to the knife and no other pieces on the board.
Around 16th minute, when Shelby is in the bathtub, her hand is on the right of her glass, but after the point of view changes, it's on the left.