There may be a small change in waiting depending on where you moved from. It is unlikely there will be another interview. You may check status on...

An H4 visa holder must have employment authorization to work.

Use of married name is authorized to use in conjunction with your nonimmigrant visa. You may but not required to inform USCIS to use married name...

Submission of stubs to employer is not required upon entering US.

At this point it is wise to bring in an immigration attorney to your team. The attorney will make sure you are not left alone making important...

Yes, take all documents, must be certified, to the interview. All pending issues, such as probation, completion of diversion agreement, and other...

You may apply for a B1/B2 visa now. If approved, it will be valid for 6 months and can be extended, by application, for another 6 months.

Best to consult a Canadian lawyer for counsel on the effect of criminal record in USA effect in Canadian immigration.

Without your letter of explanation for reason to ask for extension, the I539 Form will be denied.

It's entirely up to USCIS to adjudicate your I131 Form on its merit.