I have a 2080 too like the rest of the world !!

It has some problems with timing if you use lot's of notes.
Tips:
Place the drums and other patches with hard
attack on the upperparts of your sequencer.
In cakewalk the event are played in
trackorder from 1 to .. so place the drums
on track 1. this lets jv-2080 play the
drums first.
Get a couple of more synths and only use
20 tones or less on the same time on
2080 then it works ok.