Lighting control logic

Hi There,

I'm having some problems understanding tasks/programs. At the moment I'm just testing things out before I install in my new house so need to get things right.

So I want to use an occupancy detector to turn on and off a light, when that light has not been turned on by a scene or switch in which case it has no effect.

What seems to be happening is that when the occupancy sensor turns on the light (which it does) the scene also changes, so the IF statement to pick up that the scene is off no longer allows the light to go off under the occupancy detection?

Could some one give me an example? hopefully it make sense but please elt me know if you need further info.

Thanks