What is the difference between unlawful status and unlawful presence?

Unlawful presence starts when USCIS determines a person is not in status, or when they work without permission.

Can I file for a green card while being on B1/B2 visa?

The first step would very likely be getting alien certification, which may take a year. If then you are in the U.S., and in status, they can file...

Can I petition for my stepfather after he divorced my mother?

No.

A numbar.

They should be able to do that.

Does adopting an adult illegal immigrant in TN help them become a US citizen?

No, it is not a way to help an adult immigrate.

Asylum denied 2 yrs ago, not referred to IJ since I never been out of status, how should to proceed?

Contact the asylum office for specific instructions, probably you need to refile the 589 at the local asylum office.

Not sure, but you could easily just apply for a new card.

Can petitioner (non US citizen)be stopped from leaving the country during a divorce or for defaulting on child/spousal support?

Not likely.

What kind of petition? do i need to get back to the state my wife she is usa citizen

She cannot file for you unless she gets a waiver of the Adam Walsh Child Protection Act.

My green card expired in and i got turned down for a job as the employer won't accept my I-797 renewal notice. Can they do that?

It actually is not one of the forms allowed for the I-9. Get an I-551 stamp in your passport, by doing an infopass.