VTail Setup Question

I’m setting up a ZOHD Talon Rebel XL with a Matek H743. I have my Spektrum NX8 setup as a “regular” plane, and followed the instructions on the ArduPilot site to set the various parameters here: V-Tail Planes — Plane documentation (ardupilot.org)

Things seem to be working correctly, however the RVTail \ LVTail hardly move at all when I apply pitch control, but they move alot when I apply YAW. Is that normal?

The Radio has been calibrated and all the controls move in the expected 1100/1900 range.