The first night we see Cassie in her room, she leaves the bathroom door ajar before heading over to her dresser. When the camera cuts to her cross to close the drapes, she walks past the bathroom door, which is now wide open.
When Cassie hugs her grandma for the second time on the sidewalk, Cassie's key ring disappears between shots.
When Cassie holds the leaf in the woods, her thumb moves inconsistently between shots.