I’m an Alpine owner and know the systems quite well..
Your In Command HP and Furnace modes are BOTH on the same Zone.. in this case Rear unit is Zone 1…
If the furnace option is not switching over when you press the button that is displaying Elect mode then the DC (Display Commander) is not seeing the furnace ..
Turn off the DC and then go outside to where the BCM is and do a reset on BCM and then turn DC back on and go to rear unit and try and select furnace mode…
If issue still persists give the folks at ASA Jensen Tech Supprt a call and they will do their best to help you resolve the issue
https://in-command.net/wp-content/up...3-HVAC-QRG.pdf