My L1 B visa got expired & our employer asked us to stay in USA for my wife baby delivery where I will not get paid

This is not an immigration question.

I have 1.7 years for my H1B expiration. My manager has offered me a new position(more than 50 % different from my current post

That could work for alien certification, it may not work for the H1b.

You can use one envelope for both applications.

USCIS returned my I-751 applicaction

You may wish to see a lawyer who can check if the fees, forms, or attachments are wrong and what they are missing.

My husband married me for a green card, and now he is trying to leave

You could call Immigration and Customs Enforcement and provide whatever proof or testimony you wish to prove your allegations. You cannot stop...

COS from F-1 (OPT) to H1 and COS for Dependent F-2

She would be out of status, as you indicated.

My fiance is about to enlist in the air force and i am in the process to be approved for deferred action?

It's not clear whether parole in place will allow adjustment, possibly.

Immigration misrepresentation

A fraudulent asylum application bars other relief and there is no waiver.

Adjournment in contemplation of dismissal

What does that mean?

Got termination letter on 5th Dec 2012 , till what time can stay in country

You may have up to 60 days to port.