Sounds wired wrong.I have a Vision Pro 8000. I also noticed the unit has a red blinking light on when it is not in use. When it is making heat the light blinks faster.
Big difference in comfort between running in both stages, and only running in high stage.the slow flashing led while off and fast while on is NORMAL if coming from blower cabinet in furnace.
does your furnace maintain temp at the thermostat? IE when set to 70 it maintains 70 in the house? If so why the question? if it is working then it is working. High or low stage matters not if you are maintaining temp.