I have been adding Z-Wave Light Switch light switches to my house bit by bit. For the most part, they haven't given me too much trouble. Now I have come across a light that can be controlled in 3 different places. Also one switch is at the bottom of the stairs on a 2-gang switch where one switch is on one breaker (downstairs lights) and the switch I am working on is on another breaker (upstairs lights). All 3 locations have a neutral wire.
My first question, is does it matter that the gang box is on 2 circuits--particularly, is the neutral the same for both breakers? Second, the instructions say it matters where the switch goes, so how do I determine where each switch is in the sequence?