well i just go my BSP and the ND2 does not double trigger unless i hit the sides of the pads (and only if i'm a bit too slow, the sides are more sensitive it seems). If i hit the pads in the middle there's never any doubling (unless very slow to remove my finger).
I can reproduce what you are doing in the video though - holding down a pad, and then letting go, that will double trigger (since it's gate outs and not single triggers perhaps, i mean a gate would stay open until you remove your finger, unlike a trigger). Imo it's not a problem since that's not really how you would use it anyways to record drums, at least i don't see why you would record drums in that way. If i hit the pads fast (drumming on them) then no problem, with my ND2 at least.
These are my first ~10 mins impressions. I'll update if i notice any odd behavior other than double triggers when hitting the sides and if holding down the pads for a moment.