At the naturalization stage, your son may have a problem with INA 316, specifically residency requirments.

Yes there is a promlem with your residency. It appears you do not live in the US. I recognize the 180 days rule. Speak to an immigration attorney...

I would ask to revview your crminal history before discussing options, if any.

You may apply for the two years home country waiver. Also, consult with EB-3 employer attorney for their plans with your job offer.

Your question is not clear and/or understood. You may rewrite and repost. Good luck.

Yes, if you have one paycheck now with prior employer, you may transfer to to another employer.

In general, USCIS does not recognize annulment as end of marriage. Only final divroce decree signed by a judge is recognized and accepeted....

In general, copies of supporting documents are suffcient. Certified copies are reuqired only for criminal documents.

Yes, H1-B status is lost if you use an 485 EAD to work for multiple employers.

The nature of your question warrants a detailed review by qaualified lawyer.