Thanks for the explanation and video.
I did read the manual and it could be something with the way my throttle quadrant is set up.
I keep the Condition Lever at Taxi.
I pull the throttle lever all the way back as depicted in the photo in the documentation, where it says it should be in reverse, but it still goes forward accelerating to above 35kts. I can pull it over the detent and to the very bottom and it does go into reverse and the Beta Lights go on. Moving back above the detent, the Beta lights go out.
So, maybe, what's going on, is I'm not getting into "Beta Mode" with the Power lever. Is there a trick to get into Beta mode, besides just moving the Power levers back?
Also, in the video of the real aircraft, I noticed the pilot using 2 hands to change the Condition levers to Min-Cruise while taxiing. He moves the Condition Levers with his left hand and did something with his right hand, but it's too dark to see what his right hand did.
Dave