AHH, interesting, I hadn't realized this. But then there is still a
difference in the panel, since we have an N2 and N3 stage
displayed, so I guess the question is why these go into yellow
when the other engines with only N1 and N2 do not.

I had just assumed this was unique to RR because I had done
plenty of flights in a Delta config (GE I believe) and not seen
this weird problem.

BTW, what actually happened was this: was cruising along
without any issue that I noticed, SUDDENLY the plane pitches
up and down a bunch, and then next thing I knew it was in
some catatrophic stall from hell that, try as I might,  I could
NOT get out of. Things happened so fast that I was not able
to completely diagnose the state of the plane, but I'm pretty
sure the engines had both failed.

The first night it happened I happened to have another USB
game controller connected to the PC and I thought it had
fallen due to my cat, but a night later the same thing happened
with only the SAITEK yoke, quad, and pedals on it.

I've flown a few more flights now and its not happened, so
I'm a bit unsure about what it really was... guess I'll wait
and collect more data if no one has any other response.