Traktor Pro 2/CDJ 350 rotary knob jumps tracks, midi setting issue?

Hi everyone,

using CDJ 350 as midi controller with Traktor Pro 2.

My menu/tracks selection knob on CDJ 350 jumps 2 tracks. It would go from 1 to 4 to 7 and so forth... I'm wondering if there's some weird midi setting that I need to tweak somewhere to sort this out? I have a poor understanding of midi, hope there's someone out there who can help me out with this.

Thanks in advance,

Paolo