I. Don't. Get. It.
You want to be stopped, you apply the brake.
You want to go, you press the accelerator.
There is a small time between the brake and the accelerator when starting, and I guess it is interesting to have some assist frammitz to help incompetent drivers deal with that half-second, though motorists have managed to do OK on their own for the past century or so - even with a manual transmission with that extra pedal to deal with.
The assist frammitz is not there so you can kick back and savor the aroma of your latte or catch up on facebook while stopped on an incline. Use the "P" selection on the transmission for that, or better yet don't even do it while behind the wheel.
Sorry for the rant, but for heaven's sake you are the DRIVER..
2014 WK2 Overland 5.9L
2007 WK Limited 5.7L
And some past Durangos
Red WK #19, Hemi #68.. I think..
Durango Owners Club DOTY 2011
"Must have been that yesterday was the day that I was born"