You should use a modifier that only sends the MIDI out to the same CC as the Knob (not CC+8) when its reset paired with another inverted send monitor state. That way the knob position (not just the LED) is updated. The APC uses endless knobs, not encoders and it's layed out in a tricky way.

I did this in a mapping back in Traktor Pro 1, I doubt it will work in 2 but you can study the EQ section http://www.traktorbible.com/freaks/m...ew.aspx?id=123