CUE and Master (DJM & CDJ)

Hi!

I have a probem with my djm 800 and cdjs 2000. I do not think they are knowing which cdj is the master one because i can not hear any volume in my headphones if i dont set both chaneles on cue (on the mixer). And if i set the cue on the mixer the cue/master knob on the mixer sends the same level of volume when you turn it from left to the top. And when I keep turning it to the right (from the top to the right buttom) the sound is reducing even if I have two tracks on play. Is not this pretty strange?

Can some body please help me?