If the employer has told you that you need to seek for an attorney, there are so many of us on Avvo or AILA. But, please note that the attorney...

Will they disqualify me?

It is best that you correct the error as early as possible preferably before your interview.

Is there any way to expedite administrative processing?its been 4.5 months since i had interview and embassy has my passport.

You just need to be patient. Sometimes due to variety of factors, it takes longer.

As I work overseas, how can I apply for a Resident Visa or similar or to re apply again with the student visa but without me?

Such decisions from the Consulate are completely discretionary. You can reapply for F visa, this time in Emirates.

H1b

This is a question for company's immigration attorney. If the place of work is not changed, usually there should not be any problem.

Previous company H1B Revoke will effect the current approved H1b

It is hard to assess your case. It is best advised to contact the company's immigration attorney.

Can a h4 ead application be denied? Under what circumstances?

No expedite service is available for EAD.

Can I ask for expedited document based on I already have plane tickets?

Attorney Behar has explained it so very well. I refer you to his recommendations. Good luck.

Is my b1b2 visa still usable because i want to go back the usa ?

Yes. You can fly back to USA but the chances that you will be sent to your country are high.

Do I have a chance to get the second green card ?

Yes. It is possible. But working with an immigration attorney would help a lot. Good luck.