Cruise Control problems of the 2006 Ford Mustang

Some years prior to this incident, the cruise control would cause pulling of the car. What I mean by this is that the vehicle would pull forward as if someone were towing it from the front. This would take place after the cruise control had been used minutes or hours prior to the vehicle being shut off. Once the car was turned on again, even an hour later, would cause the car to maintain its speed (usually 10 mph or 15 mph) until the brake was pressed even though the cruise control wasn't activated. This was supposedly "fixed" by Ford through a $600 "repair" of the "computer" that controls the throttle (I have documentation to support this repair). I was unaware of this site. So now I am reporting the following terrifying incident. This 2006 Ford Mustang, about 2 years prior, had its cruise control on when all of a sudden the vehicle accelerated from 40 or 50 mph to 60 to 70 mph. The brake slowed the car but the revving was out of control. Luckily I was on an open highway around 10pm but had to drive into a gas station (luckily nothing happened) and slammed on the brakes as the engine revved hitting the upper rpms. I had to shut off the car with the ignition (leaving it in the park gear and pressing the brake, mind you!) and when turned on the car again (now in park), the car again, dangerously revved. I thought the engine was going to blow out. I shut off the car again, parked still at the entrance of this gas station. I waited some minutes and turned the car on again, sweating profusely as you can imagine, and the car was completely normal. I was convinced this had to do with the cruise control. I had aaa tow the car home and the next day I took it to Ford who claimed they had never heard of such a thing. They checked the computer again and gave it an "update". I never used the cruise control again as you can imagine and no problems with the rpms or acceleration.