Why is the "Away" set point activated on the thermostat with an airplane icon when the Schluter Smart Thermostat app home page shows "Home" and I have not left home nor set the thermostat to "Away"?

Only one account can control Geofencing at a time. This happens in situations when more than one smart phone is connected and the primary smart phone that controls the Geofencing feature is out of range. Should you wish to access control while the primary smart phone is out of range, simply log into the account, head to the Geofencing section and press "Replace device".