I'm having the same/similar problem. Snapshot 1 has a whammy pedal octave rise and snapshot 2 an octave drop. Both on EXP1.
Last night's gig was 'fun' in that both had a rise.
I can rectify this in HXEDIT but the benefit isn't saved on a power cycle. That's a blow. Return to 2.7.1 or wait for 2.8.1 and in the meantime change the setlist!?
As a newbie here running El Capitan 10.11.6, do I need the Mac Driver or is my OS playing nicely with my Helix in Class Compliant mode.
In other words, at which OS update did Apple fix things? Anyone know for sure?
Thanks.