You may not be in the US for an I-140 to be initiated, Best of luck.

Delayed birth registration sometimes raises concerns, as in your case. The suggestions are good. At some point you may need an immigration attorney...

Why do you need a dna test now? Is USCIS requesting one? May be USCIS don't need one. Good luck.

Yes, USCIS may check all your previous addresses. This should not be of concern to you as law abiding person. Good luck.

You may write to USCIS a letter to cancel your service request. Good luck.

The question does not appear to have an immigration issue and needs some clarity.

For PR safe to travel while AOS is pending because it's part of US. For other US territories, I encourage to call to determine is Customs presence...

Yes, it is impossible to get that information you are seeking over the phone. Form I-693s are sealed and only USCIS officers are authorized to open...

No problem at all. Take your divorce decree with you to the interview. Officer will update your DS-160. Good luck.

For immigration purposes, a person divorced twice, may not use last names from first marriage. You did not tell us what form you are completing. If...