Issue with Crossfader on S2

Hi! So I just recently got the Kontrol S2. I love it and I love learning with it. The problem is I think I have an issue with my crossfader. When I shift the crossfader to deck B's side I don't hear any of the track playing on deck A, like it should. However, when I shift the crossfader to deck A's side the volume of the track playing on deck B does not change and remains constant. In addition I have noticed multiple times that deck B consistently plays at a higher volume than that of deck a no matter the volume on the upfaders. Any one have any solutions? Thanks!