You will need to re-file the work permit application based on DACA.

VAWA petitions can take up to two years with the I485 to follow thereafter. There are delays with USCIS so this is not unusual.

Yes, travel within the United States should be OK.

It is best to contact USCIS to rectify the error.

USCIS can take up to 120 days to make a decision.

You need to consult with Immigration attorney given the fact that you were in removal proceedings when you departed the country.

You may attempt to do so but likely to no avail.

The GC should be issued after biometrics.

What is your question? If you have been requested to bring these items, you should do so. Consult with an attorney to prepare.

Yes USCIS will do call back during that time.