N4 Mapping Woes

Im trying to map the Switch deck buttons on my N4 so that i can switch between 1-3 and 2-4. When i press 1-3 it works as expected but when I press 2-4 it changes 1-3 with it.
I read somewhere that it was a hard ware setting but thats rubbish because it works as it should on VirtualDJ and Serato.
Is this something I could map myself or is it possible for someone to help me with?
I read somewhere that it was a hard ware setting but thats rubbish because it works as it should on VirtualDJ and Serato.
Is this something I could map myself or is it possible for someone to help me with?