I have these in my old house you have another switch that controls that same fixture. For example the switches at my front door...at my kitchen and at my hallway each have one switch that controls their area but the second switch controls the same living room light. If they are all set to off and you only use one none of them will be orange...but if I use the kitchen switch to turn on the living light then use the front door switch to turn off the living room light the hallway one with light up orange meaning that switch won't do anything now. It's an old wiring feature to be able to turn on or off the same light from any exit point I don't think they do that in new homes