1999 Nissan Quest cruise control problems

When cruise control is activated, it does not always turn off when the brakes are applied or cancel switch is pushed. If I have cruise set at 65 and approach and intersection or object in the road or lower speed zone, and apply the brakes but then press the accelerator to continue at a lower speed (45), the accelerator will go down on its own and the van will accelerate on its own till it hits the 65 MPH that was originally set on the cruise. This occured 3 out of the last 5 times the cruise control was used.

The gas pedal on my 1999 nissan quest sticks quite often, such that you must jam your foot onto the pedal to depress it. This is a dangerous situation as when you do jam the pedal the car must accelerate quickly into traffic. My mechanic looked at the pedal and could not find any problem with it, since it wouldn't stick when he was testing it. However, it does get stuck very often. I've seen postings on the web from others who also state the same problem with this vehicle.