Having trouble properly setting the heating/cooling set point schedules

Hello, I'm trying to enter custom set point schedules so that my building is only conditioned during occupied hours.  After combing through these forums I tried multiple methods, but I'm still getting results that show heating loads when the building is unoccupied.

I only want to condition the building from 8 am to 8 pm Monday-Friday.  I've been focusing on the heating set points to troubleshoot my issue.

The main two methods I have tried:

1. Create a CSV Schedule & assign using the setEPZoneSchedules component: for this one I started with a schedule that defined the heating set point as 20 when I wanted the HVAC on, and 0 when I wanted it off.
2. Define cooling/heating set points and setbacks using setEPZoneThresholds: the "readMe" told me that there were no setback schedules to define (the schedule it was replacing was from the Office program).

As a final option, under method #1 I created a heating set point schedule with all hours at 0 to see if I could at least get the heating turned off all the time, but nope!  I still got some hours with heating, although the zone temperature was always well above 0.

I feel like I'm missing something very basic here!  Is there another method to set an HVAC on/off schedule?  I'm not getting any errors, so it's hard for me to know where exactly I'm making a mistake.  I've attached my GH file with some notes.

Thank you!!