Between shots, as Jody stands at the stairs telling David her story, her hair changes position.
Between shots, the teddy Jody cuddles in bed changes the direction it faces.
When Jody lies down in Kathy's bed the shelf above her head is low enough for her to easily reach up for the stuffed animal. The next day the shelf is suddenly much higher up on the wall.
When David goes out of his bedroom to investigate the noise the stuffed animal makes he leaves the bedroom door open. A little later the door can be seen from the downstairs landing, and it is closed.
The couch and tables between the stairs to the "upstairs" landing keep changing position. Sometimes it's closer to the left stairs and sometimes closer to the right.