Hi Bob,
I don't follow exactly, but I think there is a simple solution. KPL buttons can not be controlled programmatically (unless it is the button with the load), they must be controlled from a scene. So, if I understand you want to issue a command to the scene, If this is true use type "Command" then for the command set the Scene to "ON".
https://wiki.universal-devices.com/UD_Mobile#Favorite_Custom_Toggle
With that said check out the 5.x fan example which simplifies KPL Buttons, so you only need 3 (high, med, low) and only one can be lit at a given time, pressing the lit button will turn the fan off. Then UD Mobile can control the fan module directly and the KPL Buttons will remain in sync.
https://wiki.universal-devices.com/ISY994i:INSTEON_Device:FanLinc-KPL_FanLinc_KeypadLinc_Configuration