Brake Disc Rotor problems of the 2003 Nissan 350Z

Jan 03 the brakes would squeal loudly when braking in cold weather. The two front tires continually lost air and needed to be refilled every 3-4 weeks. Upon dealer inspection, nothing was found wrong. Upon recall notice of the growling of the tires (around April 04) the vehicle was brought into the dealership and the two front tires were replaced. The vehicle had to be brought back twice due to the alignment being done incorrectly (steering wheel was crooked and slip & vdc off lights were illuminated). Since the tire replacement, the two new front tires still lose air and need to be filled up every 2-3 weeks now. The tires occasionally squeal loudly when braking. Dec 04 the dashboard was lit up with the following warning lights:1. Brakes 2. Vdc off 3. Slip upon towing the vehicle into Nissan (because the front passenger tire went mysteriously flat again), Nissan dealer has advised that the front brake pads are worn through to less than 10% and need to be replaced. They also reported the front tires had no holes and the tire beading was fine. They suggested the tires go low and the warning indicator sounds because it is a sensitive car. It is my personal theory that the vehicle has a design flaw within the suspension and the vehicle is also placing too much weight and pressure on the front tires which has caused: 1. Growling 2. Front tires to lose air 3. Brakes to wear unreasonably fast 4. Squealing when braking. The dealer has not been satisfactory in their responses or suggestions. The vehicle is in the dealer now; I requested they give me the worn brake pads when I pick up the car.