Best to consult with an Canadian immigration official to determine entry requirements.

Unauthorized work may be forgiven in AOS through marriage to USC.

Contact USCIS directly inquire about current VAWA processing times.

Contact USCIS to confirm the address of the Texas Service Center.

You may consider a second opinion from another lawyer and can request a copy of your file for review.

Yes you can withdraw the application and travel with GC.

Yes you may do so with valid basis for extension.

No this should not be necessary given your status.

Depends on the specifics of your finances. Consult with an attorney for assistance.

It means that your case is actively being reviewed.