OK, it's working. Following your note, LeCuvier, I went to the Axis commands. I noticed that the single "thrust" was set to Joy_z. I deleted that, and then set the thrust left to joy_ry and thrust right to joy_rx, and then went to Axis Tune Panel for each and set them to "Slider". Now it works just like my old Logitech throttle worked, and I can use 100% of the throttle and turn on the afterburners! And I also have separate controls for each engine. Now I just need to figure out exactly where in the percentage the afterburner detents should be, and it'll be perfect! Thanks!
Batmensch's post in Winwing Orion 2 throttle range problem was marked as the answer