Yes you can attempt to do so but unclear basis.

Your question does not appear to be immigration related.

Best to consult with an attorney for further guidance. Good luck.

Yes this is tested for and not advisable.

Get the new passport and keep the old passport for current visa.

It is advisable to consult with an attorney to prepare and assist with your case. You may use the Avvo search tool to find an experienced attorney....

Likely since the case was reviewed after it was upgraded.

Contact USCIS to inquire directly about status.

Yes you may do so at time of interview.

Yes as long as you remain unmarried.