When the sheriff approaches the front desk of his station he places his sunglasses on the desk with his right hand. When the angle changes his glasses disappear from the desk, back into his right hand.
At minute 16 when the Sheriff hands Maria his card she puts it in her right pocket. Then in the next shot she is still holding the card. It switches to no card in the next shot. Then she is holding it for the rest of the scene.
After Maria picks up Isabel in her Jetta she asks if it has air. Maria says it's up all the way. But you can tell the windows are actually open because of Isabels hair moving around from the breeze coming in.