Zahos, I think the terms "boost cut" and "over boost protection" are being confused. You are right. The term is not "boost cut", its "over boost protection". Also, how could users of this, or any other performance forum be anything but "keyboard tuners"?
My car had the same problem. Anything over about 10psi would cause misfire around 5000rpm. It was previously worse (miss @ stock psi) before the plugs were regapped to 0.8. I got a hold of a chipped ECU and this solved the problem. Now I'm running 13psi without any dramas.