Reply to FX unit problems in Traktor P2

I've been putting together and perfecting my own mapping for my Allen and Heath Xone 4D in traktor P2, and have one problem thats really bugging me and i just can't seem to get my head around! When i a sign the the buttons and knobs i want to use for the effects on and amounts, for fx unit 2, visually they control fx unit 2, but the actual effect put on top the sound playing through deck A! leaving me with both fx units controlling deck A. If anyone could shed some light on this situation i'd be very grateful and happy to share my mapping once i've got it right.

Many thanks.