Reply to VCI 100 Faders and Knob Messing up in Traktor Pro 1.2.1

Hi, I've got a massive issue - the Deck B default volume fader and the B balance knob are acting all weird in Traktor. They jump all over place and randomly turn to extreme settings when moving them. This seems to be either due to a glitch in my controller or Traktor - has anyone had similar problems? It makes internal mixing impossible. I've gigged quite a bit with this VCI, so it might be broken - any suggestions for a fix? Or is this a Traktor bug with the respective MIDI CC's (013, 028 and 031)?

For the record, I've got firmware 1.2 but it worked all fine before. I've been mixing externally for more than 6 months now, only noticed problems in Traktor Pro.

Any help greatly appreciated!!