Yes. Child support and visitation are two separate issues. You need to return to court and request a visitation order or file a motion for contempt if the mother is in violation of a visitation order. If you stop paying your child support that will compound your problems.
If the mother has the full custody then she can take the child, and she can get the child support. If she doesn't have the full custody, then she is not allowed to take the child without the father consent, but she still can get the child support.
yes
Yes, being granted full custody does not relieve the other parent of their financial obligations to the child(ren).
How does he have any visitation rights with a custody and child support order?
You may have to pay child support to the one who has custody of your children.
her choice
Superficially yes. But if someone is still paying child support then they also have custody by rights. Though you would have full and the person paying it would have some time with the child typically
Custody is a separate issue from money. Child support payments are about money. Custody is about who raises a child, who is in charge of that child and with whom does that child live.
Absolutely. Unless the other parents rights have been terminated by a judge, (s)he must pay child support according to the state calculator. Visitation and custody are not related to support.
You can't. If there has been a change in the custody order you are still responsible for any arrears incurred while the other parent had legal custody. Your garnishment will not be returned to you since it was imposed for money you owed. You owe those arrears until they are paid in full regardless of the change in custody.
Welfare will help in obtain child support and/or state aid.
Yes; he can.