Originally Posted by peridigm
The rolling back on a hill is by design. It's called HSA Hill Start Assist. It's not just a Ford thing. Basically the way it works is when you remove your foot from the brake on a hill, the car will remain stationary for 2-3 seconds. After the delay HSA releases and the car is free to roll like a manual trans would.
After HSA releases the car will roll till it engages the parking lock. This is similar to a normal automatic parking on a hill, once you release the brakes it will roll a little.
Unless yours rolls away, then you have a real issue!