Reply to Cue problem with the S4

Hey guys, I'm having a problem with my Cue function on my S4. Lets say I'm cueing up a track on the A deck, and the crossfader is all the way to the right on the B deck, I can still hear the track from the A deck although the Cue button is pushed.. The same thing happens vise-versa.

any suggestions ?

and also I have headphones plugged in.

Thanks !