Unfortunately, yes.
see links below
no
Only the mother has standing to learn that
Nothing changes regarding child support orders whether it is the mother or the father who is remarrying. The child/children are the responsibility of the biological parents not a new spouse. For example if the mother marries someone of substantial means it would not affect the child support amount that was ordered to be paid by the biological father, as the mother's new spouse has no legal obligation to support the child/children.
no not at all
A DNA test can prove if the biological father is actually the father. If it is proven he is the father, then he should have all parental rights as any other parent.
Except in an adoption, there is no such person as a "non biological father." The only man who should be signing a birth certificate is the child's biological father. Any other man who signs it is making an illegal statement.
California
GET A FAMILY ATTORNEY
no
Generally, no.
no
The step father would have to adopt the child. For this to happen, the biological father would have to relinquish all rights through the court system.