Yes, and no. Theoretically, the time the vehicle was actually checked out should have been recorded (especially at an airport location with an exit booth), and in that case you would be correct--the price would have been adjusted automatically. It's possible though that the time was recorded incorrectly and the contract did reflect the early pickup time and would have priced higher at the return, but even in that case, there probably wasn't any need to spend two hours on the phone as it would have been a quick adjustment at vehicle return (at least that's the way we would have handled it).