Avis gave me a reservation for 36 days of renting a car at a specific price. Some days after the car was returned, I realized they had split the 36 days into two separate rentals, with a total price increase of $69, about 7.5%, The rental office at McCellan Palomar airport in Carlsbad, CA, has not been helpful. Partly they do not recognize that their charges should simply be equal to their reservation. Partly they do not recognize that a limitation in their billing system (no rentals longer than 31 days) does not entitle Avis to increase its price. Lastly they claim that only Corpoate can adjust the second rental to make the total price equal to the reservation. So now I must chase at another place.