My car has around 6,500 miles on it and it was purchased last Nov. A couple things I still cannot drive the car smoothly. Here are the cases.

First, when I slow down the speed without completely stop, I switch and step on the gas paddle. Unless I have to be VERY gentle with the paddle, the transmission seems picking up a lower gear with normal stepping on. Sometimes, I can feel the car jumps. This is really a rough drive. I didn't have ECM update because the dealer told me it has been done in factory. Is that matter? I also heard there is a learning computer to learn your driving behavior. But how long does it really learn? Once it learns, what happen with other drivers or you change your driving behavior?

Regarding to braking, I drive downhill everyday. I have noticed that the transmission has downed gears and electronic brake kicks in after a few seconds. The car suddenly decreases the speed when the electronic brake is on.

I usually drive smoothly both acceleration and braking with other cars like my previous ES300. I intend not to press the gas and brake paddle to hard. Is something wrong with my driving behavior? Or this is a difficult/complicated vehicle to drive?

Any advice?