Alan accuses Jane of knifing the tire, which is flat, but two minutes later when he runs out of the house with Alice we can see that the tire is fine.
When Jane wakes up her daughter at the farmhouse, the clock reads 4:31. But about ten seconds later, in another shot the clock reads 4:38.
The flashback tragic event takes place on October 11, 1985, but when she stands in front of her mother's grave at the end the headstone reads "Died June 8, 1986."
As the family enters the old house, it is clean and without dust and cobwebs.