Can’t wait to try this when my ScaleTrains tunnel motor arrives!

Not long bought a ScaleTrains SD40-2B. I have another brand locomotive, Tsunami2...... When the loco(GP38-2) has reached the top of the grade on my layout, with my NCE throttle, I choose F27 and the loco notches down. I continue to go F27 until Im happy with what ever notch I want. If I dont choose Dyn.Brake then I choose F26 and the engine revs back up....one notch at a time , as in F26,F26.F26. Now....this ST 40-2. I do the same. Notch down, notch down after reaching the top of the grade....F27, F27,F27. But! The 40-2B notches down to idle then notches back to Run 8. Must say it sounds great but then after reaching Run 8, it goes back to idle one notch at a time. Then back to Run 8. Any ideas? Im a retired Loco Engineer and like to run my models the way I drove the real locos.

I actually like the "lot of push buttoning!"

Just got a Rapido N scale FP9A and the drive hold does not work as well as that. Hmmm. Definitely not as responsive as that and when I do get it to notch up it will cycle, nothing up and down, up and down, without touching the drive hold button.

How is this different from manual notching?