Weird. I don't control RB and I was getting too many YPC.
What are your main menu settings? Mine are all default and all-pro. 10 injury, 100 threshold and 60 fatigue. Then in CFM I input Whosnext00's sliders.
This set isn't perfect but so far has offered me the most realistic games by far. I changed coverage/reaction time too as I felt defenders were reacting to the run a little quicker than their ratings. I'll post my minor tweaks later if you're interested.