5 months since green card interview

I agree with my colleague. This is not a normal waiting time. Then again, getting an interview in 2 months is not common, either. Consider filing a...

On December 17, 2013, your Alien Registration Number was changed relating to your I765, APPLICATION FOR EMPLOYMENT AUTHORIZATION

Yes, this is your alien #. Don't worry.

I have read that a two hole punch in the top middle with 2-inch prong fasteners is what USCIS officially requests.

My case didnt switched to optimized yet

I would recommend scheduling an infopass. I don't think it is cause to be worried, though.

N-400 If I leave on Nov. 1 and arrive abroad on Nov. 2, should Nov. 1 be considered a day away?

I agree with my colleagues. A partial day is a full day in the US.

Can I travel outside US after approved I-130 but before filing I485 with valid H1-B visa?

You can travel on the H-1B. No problem with immigrant intent here.

Can food stamps affect my immigration case?

The U visa comes with a broad waiver. It pardons practically all criminal and immigration violations. The only problem with taking government...

Does USCIS do background check of affiants' residency status?

From an immigration point of view there are no problems presented by this situation.

Can a person born in India, residing in USA on a L1B visa seek divorce from his spouse residing in India?.

This depends on the state law where he is living.

Am I eligible for the L1 visa if the US company does not have a UK based office?

L-1 visas are for multinational managers. Basically, your company does have to have a UK office.