I was meaning physically press the switch by hand while watching the diagnostic page.
Sounds like the switches are faulty on the Y, Also sounds like you have the active state of the X set wrong. However that doesnt really make sense as I would have thought all switches would have been Normally closed switches but it seems by your description above the X is normally open and Z normally closed.
So really what you want to try is like I say just press the switches with your hand and then tell me what happens on the diagnoostics page for X Y and Z when you press their respective switches (m1 is X, M2 is Y and M3 is Z)
Hood