Yes, you have to pay until she is emancipated.
Yes, see link
The parent that pays child support does not need to pay child support for her child`s kids, only the current right parent.
Yes.
No, but you have to tell the venue that issued the support order.
Yes, you have to pay until they are emancipated.
Child support is to provide for children not living with you, it would be assumed if you are living with your child that you are supporting them - take it up with your local child support board.
It depends on your state. Normally child support ends upon the age of majority in your state or emancipation. Unless a child is considered emancipated through giving birth, you will probably have to continue paying support. However, there are a few states that end child support at that time. Check your local state laws.
garnishee
Yes. Regardless of whether she had a baby or not you need to keep paying child support until she is a legal adult.
Yes; the usual method of paying child support is through income withholding.
No it doesn't
If he's paying child support for the child.