Fuel Injector problems of the 2002 Jeep Laredo

I've had two incidents where I had problems with the rotors on this car. 1st incident was 8/02 at 8,700 mile & now 11/04 at 17,242 miles. Each time as driving I would apply the brake a steering wheel would shake. I brought the car to the dealer and each time they informed me that there was not a problem with rotors being a defective, but they warped due to my driving habits. How would they know my driving habits. I've had several cars in my lifetime and never had these problems. I also had a problem with the fuel injection. It was also repaired by the dealership. I contacted Chrysler customer service and they were not helpful. Claims that it's not a defect and he said that the rotors can warp after just one trip. I really doubt that. He was extremely rude. I guess with this type of vehicle it's going to be customary to have these repairs done after 8,700 miles.