Reply to change deck control with s4 please help

so if anyone knows how please tell

my s4 fader deck A is defect like moving on its own when down in the software it goes up..

so i want to control deck A and B in traktor with B and D on the s4, right side of S4 how ?

or if that is not possible how to make traktor deck A and B (the upper ones) to respond to s4 deck C and D because i want the first two deck AB in traktor to control not the CD because they are bottom ?

is that possible ? how
thanks