When the tub of bathwater at the motel is shown from the side, it always has water in it. In all the overhead shots, it is empty and the drain is not plugged.
When Tim goes swerves around the truck on his way to the house you can see a hubcap rolling off the left side of his car. Both hubcaps are on the left side of his car in following scenes.
When Tim enters the house (about 27 minutes in), the panning shots show that there are dirty dishes in the sink under a leaking faucet. After a flashback, the dishes are gone (and some other items have moved), even though Tim never touched them.
When Tim pulls up to Jessicas parents house, you can see the camera crew in the reflection of the car window.
Tim says he knew the man that lived in the house Franny brings him to, and that he has been there before. In that case, If Franny went missing in 1985 (20 years ago), Tim should have recognized Franny, or at least have been familiar with her story.