Can I file a complaint against a visa officer?

You can contact the Embassy to report the conduct but uncertain whether this will assist in your relative’s case. It would be best to reapply with...

Can I consider myself as resident with a approval Applications such as I-360 and I-485?

It is best to consult with an attorney for a review of your immigration court proceedings if you do not already have an attorney.

Based on the nature of the groups you belonged to, this should not be an issue. You can explain the error of not including the information on the...

My mother in law overstay here tourist visa ?

Unclear whether she overstayed past a decision on the EOS. If not, she should be okay, assuming the extension was filed before the I94 expiry....

Immigration

Yes you can apply for a marriage based petition while the extension is pending.

It is best to consult with your employer’s attorney assisting you with the filing.

Am I in jeopardy of losing my naturalization?

It depends on whether you obtained your citizenship through any fraudulent means, which in that case, you run the risk of losing your status.

Why did the consular officer asked me to be seated after my interview and i was called back in another window?

Do you have a decision from the interview? The movement from my window to the next is not indicative of a decision.

What kind of questions are expected in a GC interview ?. I

You should definitely consult with your hired attorney for guidance regarding the adjustment of status interview. Good luck.

What is the period time between fingerprints and interview for citizenship

It can be anywhere between 6-12 months after biometrics, unless the case is undergoing further background check.