TRS 2006 surveyor troubles

I have TRS 2006 and in surveyor after I make a industry I run a few trains and thenshut the computer down. When I come back my locos won’t hold a throttle postion, it returns to 0 notch or won’t stay in any given notch. I do not understand why!?!?!? Any help? Thanks.

I’ve seen the throttle return-to-zero problem when using locos that require a separate startup sequence. Are the loco’s in question SD70’s by any chance?

DV