If Paul wanted to say what you say he says then he could have used both those statements because both are true webdog.
For if the many will die by the trespass of the one man
For if the many are dying by the trespass of the one man
But Paul said, "The many died."
RO 5:15 But the gift is not like the trespass. For if the many died by the trespass of the one man, how much more did God's grace and the gift that came by the grace of the one man, Jesus Christ, overflow to the many!
PS 51:5 Surely I was sinful at birth, sinful from the time my mother conceived me.
john.