When the debate is about peak oil how can any biofuel be counted towrds production?

Because peak oil is not really the relevant metric. It is peak energy. One could say "Sure, we lost 1 million bpd of oil, but we gained 2 million bpd of ethanol." But an accurate metric has to account for the net of that 2 million bpd of ethanol.

"Because peak oil is not really the relevant metric. It is peak energy"

Do you mean to say "peak liquid fuels"?

Yeh Robert - I'd certainly prefer to keep petroleum on one side (C+C+NGL) and other liquids and other forms of energy that may be used to mitigate the shortfall on the other side of the equation.

Peak energy is what we should be focussed on with PO (C+C+NGL) a subset of that broader debate - IMO.