Why was my H-1 put under a 221-G status?

Impossible to determine without more facts not in evidence here.

At the very least, schedule an INFOPASS appointment at this time.

REGARDING I 130 INTERVIEW Spouse & Infant child Outside US

Definitely "Service Error". My colleague gave you excellent advice. Follow it.

Joint sponsor's spouse form i-864A Is it mandatory ?

Yes, as the co-sponsor's spouse/household member signing that Suppl. A is mandatory indeed.

I-94 Extension for my wife and kids ?

One (1) Form I-539 is needed for both wife and child.

How do I pick up my certificate of disposition for an ACD?

You need to request that certified document from your local courthouse. I agree with my colleague. You do not presently qualify for...

My case is refused because domicile should stay there 221(g) but my mother re-establish would I get the visa ??

You need to have an experienced lawyer analyze the facts to determine.

Can my husband sponsor me if he has recently started a job with sufficient income (previously was a student with a small job)?

Even though husband's income currently qualifies, might be best to have a co-sponsor if his income for 2017 was less than $25K.

Will I get deported if they found out I've been married?

Unfortunately removal proceedings may be initiated against you as a consequence of your misrepresentation when applying for your immigrant visa to...

Parents don't even stand a prayer the next time, unless work with an experienced attorney, but even that is not a guarantee.