Throughout the show, Melinda's car changes between two different years or Jeep.
Example: In Voices the car is clearly a newer model Jeep, when she is going to visit someone they show her driving a different year of Jeep
When driving towards Claremont, there is a shot taken from the outside of Melinda's car where you see her drive by. Inside you can see her wearing a red beanie. In the next take, immediately after, she is not seen wearing one.
When the clock radio in the bedroom starts making voices, the time says 11:32. When she goes over to the radio it shows 11:31. Then it goes back to saying 11:32.
EDIT: Since the ghost is possessing the radio during this time, this more than likely was intentional.