Pregen Valeros's hp should be 11, not 12.
Pregen Valeros's longsword attack bonus should be +5 (the prototype pregen character sheet had a different layout with multiple weapon entries with/without Power Attack, and it looks like the Power Attack attack bonus was used on the final pregen for his normal attack bonus).
Pregen Valeros's longsword attack bonus with Power Attack should be +4.
I sincerely apologize if I am misunderstanding something, but why would Valeros's longsword attack bonus with Power Attack be LESS than his normal longsword attack bonus?