If you filed online, can't you download it? Regardless, contact a senator or congressmen for assistance, and also file a FOIA request to get a...

Try contacting the DHS lockbox, or see if they cashed your check.

You can check your priority date at https://travel.state.gov/content/travel/en/legal/visa-law0/visa-bulletin.html

An applicant for a timely filed application for extension of status is expected to stay in the U.S. until there is a decision.

You could certainly make a service request if the case is beyond normal processing times.

It is possible CIS would approve it notwithstanding the delay.

Yes, you can remarry and bring your spouse as an H4. You will have your I-485 denied if you remarry.

To be issued an H1b for a consulting position, it very likely will be required to show that there is work for you to do if you are issued a visa...

I would not expect any issues for consular processing. You can contact the various consulates in Mexico and Canada to request third country...

There is no specific rule about it, as far as I know. But my educated guess is they will stop rescheduling you after a second request.