Chances are that when you entered in the damage profiles for the vehicles in this event, you activated the Newton's 3rd Law feature on both vehicles. Clicking on this check box causes EDCRASH to calculate the PDOF for the selected vehicle based on the vehicles' impact heading angles and the PDOF of the other vehicle. This is a convenient way to assign the PDOF for one vehicle. YOU CANNOT USE THIS CHECK BOX FOR BOTH VEHICLES!