Why am I saying this? How do you know they didn't hit TOGA a second time? Would make sense to me. If there are CBs about or WSHR it would make perfect sense. Notwithstanding the fact that pressing it once will give you a margin above buffet speed to account for any turbulence or shear surely it would make sense to use all power available. A windshear go around is an escape manoeuvre after all. I'd rather escape with a big margin than just what is required for certification. Wouldn't you?