When Set Point Controller is set to "Flair App", Flair will control the set point on your smart thermostat by gently nudging it up or down to keep your home at the desired temperature. You will define a set point in Flair, and Flair will use that as your home set point.
If you notice that your smart thermostat is set to a different temperature than Flair, that means Flair has determined that your home needs a different level of heating/cooling and has nudged the set point on your smart thermostat.
This is intended behavior to keep your home comfortable.
Note: If you do not want Flair to control your smart thermostat set point, then set Set Point Controller to "Thermostat".