WHILE IN PARK WITH THE DRIVER DOOR OPEN, TRUCK OFF, RADIO ON, CONFIRMED SHIFTER WAS IN PARK POSITION. I ACCIDENTALLY ENGAGED MANUAL TRANSMISSION CONTROL IN FRONT OF AND GEAR SELECTOR AT THUMB POSITION OF SHIFTER AS BOTH ARE UNAVOIDABLE. AS I WAS GETTING OUT TO REACH SOMETHING IN THE BACK SEAT, TRUCK RELEASED PARK AND ROLLED AWAY. IN ADDITION, WHILE DRIVING IN D (DRIVE) THUMB ACCIDENTALLY MADE CONTACT WITH (-) CONTROL AND QUICKLY DECELERATED TO A QUICK STALLED STOP, BEGINNING AT 50 MPH DOWN TO A STOP IN THE ROAD IN LESS THAN ONE QUARTER OF A MILE. M (MANUAL) SELECTOR IS AN OPTION ON THE PANEL, HOWEVER, BOTH THESE EVENTS HAPPENED WHILE IN P AND D, RESPECTIVELY. IN PARK THE TRUCK WAS IN A STALL AND STOPPED. IN D THE TRUCK WAS TRAVELING AT 50 MPH. THIS IS A SOFTWARE MALFUNCTION THAT IS ALLOWING AN OVERRIDE OF BRAKING WHILE IN PARK AND RAPID SHIFTING AT THE TOUCH OF ONE CONTROL THAT SITS UNDER THE DRIVERS THUMB.