The ISY creates the two Insteon Scenes automatically when the following definition is used.
Stair Light - ISY Scene
Stair Upper Switch
Stair Lower Switch
Stair Upper Switch is Controller, Stair Lower Switch is Responder
Stair Lower Switch is Controller, Stair Upper Switch is Responder.
Suggest running Event Viewer at LEVEL 3. Run the Program Then clause that sets the 30% values in the switches. Post the event trace. Operate both switches with event 30% values set. Post event viewer trace.