Are you seeing the electric heat come on at the end of the normal heat stage 1, as mentioned in this thread:
Or have you seen temperature overshoot (which may be the same issue) as others have mentioned?
In my area of the country, the heat pump should be sufficient for heating, and the electric heat reserved for when it fails (i.e. an emergency), or the rare occurrence it gets too cold outside for the heat pump to continue functioning sufficiently (auxiliary). Most thermostats (< 30 years old) these days cover both functions. I’d say if you are used to seeing the electric heat run, try the aux function. If instead, you panic when it does run, go with the emergency function as suggested.
I appreciate the info provided, but I will wait for an official response on the proper setup. Seems like a simple task which has been overlooked.