How does new USCIS policy of keeping previous visa valid atleast 30 days prior to F1 approval affects in my below situation ?

You have received some very odd answers. You have already filed the H-4 extension so you are fine. Just file the change of status as soon as you can.

You should be able to do it and you certainly do not need a lawyer if you already did it by yourself. Good luck.

Can I marry and Petition for my new spouse After Divorced with Ex husband after getting IR 1 green card for 10 years ? ?

Most importantly you should file for naturalization if you were married to your first husband for at least two years. Once you are naturalized...

EB1C - L1A - India - 7 year term ending - I 94 expiry - Oct 21st 2017 .

These questions are for your attorney. And the company's attorney is also YOUR attorney even if he/she doesn't like it. AVVO is for people who...

Doesn't your immigration attorney know this answer? AVVO is really for people who need an attorney. Good luck.

Can my spouse and I travel to another country if he is in the application process of getting a green card?

Travel is only allowed with advance parole (I-131) which I am sure you applied for. It takes 3-4 weeks to obtain. The travel is fine as long as the...

Immigration question: How long usually would it take to "opt out" form F1 category back to F2B?

You cannot go from a US citizen back to a permanent resident so what you are suggesting is impossible. The category is based on the status of the...

Am I allowed to work for a 180 day period after my OPT EAD expires as long as I have a case pending with the USCIS?

You are not allowed to work after the EAD/OPT expires. You also are NOT accruing unlawful presence despite what another answer may have indicated.

Can an H1B worker enroll in higher education like MBA or MS while still working on job?

Yes, you can. Doesn't your immigration attorney know this? The company's attorney is also YOUR attorney.

Can I sponsor my niece and her family to the USA, I have no other relatives here?

Unfortunately, the answer is no. Assuming you are a US citizen you can only "sponsor" your parents, spouse or sons/daughters/children.