Reply to FX Nob D / Delay

I'm using Traktor Pro 1.2.7 with a VCI-100 and the SE overlay, firmware 1.3. I have the latest midi mapping for the VCI-100SE installed, and I've restarted Traktor multiple times to try to fix the issue. When I press the delay FX button, it enables the headphone monitor for the deck A. Additionally, the button illuminates when the Deck A monitor headphone button is pressed and vice versa.

Is this a problem with the mapping, or a feature I don't quite understand?

Best,
Wade