Ok, got it!
Went to the flying field today and finally figured it out. You were right of course, had to set both end points of the throttle and it saw it. I did find I needed to reverse the throttle in the radio setup and then it all worked fine.
Tossed the plane in the air and it all did wonderfully. Back on the ground and made adjustments with D/R and Expo and tossed it again. Had fun till storm clouds got too close and had to call it a day.