I signed a divorce agreement just using her lawyer and there was a QDRO and i dont agree with something can i stop it

Go to court ASAP and tell the judge you no longer agree with what you signed. It is not final until the judge says it is.

Can i file for divorce for free if the spouse is nowhere to be found?

You can file free if you qualify as a pauper, but you will probably have to pay the publication fee for service by publication.

Could a marriage dissolvement be thrown out

The reason you provided does not warrant the setting-aside of your judgment for dissolution. Penalties for the mail issue are not likely.

Can a polygraph be requested for divorce and custody in court

No.

Best decision in an affidavit expenses divorce cases

The judge is merely following the law. It is what it is and you would be wise to accept it. Others make it, and you will too.

Go to court and tell the truth, and do not assume that she can convince the judge of anything.

Can't afford a divorce attorney

I suggest that you make yourself afford an attorney. If you have been able to afford an attorney up until now, you should be able to find a way to...

May i file charges for spousal abuse(emotional and psychological) against my ex-wife in a divorce hearing

If you have not been successful asking your spouse and her mother for reasonable visitation, then bypass them and ask the judge.

May a polygraph be administered in a divorce hearing to tell who is telling the truth if one of the parties agrees to it

No.

Is there anything I can do to keep the costs of my divorce down?

Make sure your settlement position is reasonable and treat your spouse with respect and understanding.