i think i'm the only one who has this problem, because after a long search i haven't found no others with the same problem.
On my Helix LT the two EXP 1/2 LEDs are always turned on, either wha/volume are used or not in the patch.
My helix has been patched to the latest firmware directly from the official technic assistance point here in italy.
i bought LT on 1st of march and sent to assistance on 4th of march because it freezed after some minutes since power on.
after 20 days i finally had back my LT, upgraded to 2.71, and finally full working, except for the two EXP 1/2 LEDs that always stay both on.
if i add wha or volume to the patch and i activate the exp toe, the expression pedal works fine (i hear wha o volume changes etc), but the two leds still turned on.
if this won't broke my LT, i will live with, because after a 850€ expence i don't like to send it in assitance for at least others 20 days.
i appreciate any helps