@ umar i have mine set as channel 1 and channel 2 dont know if it will make a difference but i would recomend you try it , turn the CDJ's on and put to control mode then open traktor, go to file, preferences and sound setup, make sure it is set to pioneer aiso, then go to output routing and set deck
a & b to a cdj, some times deck a will go through channel 2 on your mixer and deck b through chanel 1 if so go back into output routing and change it so the sound is going through the right channel
hope this is helpful for you