I just got the BMM which seems to answer question #2. Per pg. 21: "Any fall, or any damage dealt to an arm or front torso location, also damages that ’Mech’s lifted cargo." The way I read it, a falling 'Mech hangs on to the cargo, but the cargo takes damage for each point of fall damage applied to the 'Mech (regardless of location). However this rule also seems to change the way attacks damage the cargo in that only damage to the arms or front torso (so not the head, legs, or back) get applied to the cargo vs any attack as in TW. I like this version, so I'm not complaining, just pointing out the difference.