My visa is going to expire soon,but the expiration date on my I94 is a different one.

Once you enter in USA on a visa, date given on I-94 is the date you can live legally in USA

What is the legal situation?

You have a green card and you can file an I-130 immigrant petition for your husband. I-130, This will not help your husband to remain in the US...

Timely filing for AOS

received date in the USCIS is considered for timely filing.

Sure, if you have it, send it. it's good to send every document you guys have together to avoid RFE.

Nvc case number alotted

It depends how fast you send the required documents and pay NVC fees. At present, NVC is backlogged and at least 4 months to complete the process.

Can I get a SSN with the Form I-94 and the U visa?

If you have notice of work permit approved, you should have received your card also, Please call USCIS customer service to make sure that it's not...

Do I need an Attorney to help me with form DS-261?

Yes, if you are unable to answer the questions in it, you should get help from Attorney to avoid Delays and mistakes.

Nvc case number alotted

You did not specify your category for Visa. Anyway, you need to pay visa fees and then submit all the required documents with Affidavit of Support,...

N400 with a misdemeanor what to I put on PART 11 and do I send any kind of paperwork with the application?

You will need certified records from the court and police report. Before filing your application you should contact an immigration attorney.

Got my i 140 approval with priority date 2nd April 2012, my PERM applied date was 2 April 2014.

Your employer should take care of this mistake made by USCIS.