Other mistake: When Devito sends Arnold into the house to get his stuff and go with him to New Mexico and Houston, Devito quickly jumps into the car to drive off. (You can see on the long street behind him that there are no cars coming). Yet, not one second has gone by and you are looking at him from the front of the car and Linda and her sister pull up behind him blocking him in the driveway. They turned in from the left which was the same stretch of street you were looking at with no cars on it just one moment earlier.
Other mistake: When Julius visits the orphanage where Vincent grew up, he begins to talk to the nun about the bed where Vincent slept and how it was near the fire extinguisher and alarm. While talking about it, he makes a motion as though he is pulling the fire alarm, but doesn't actually do so. As Julius and the nun are exiting the room, the alarm pull handle falls down on its own (no alarm goes off).