What is my status during Change of Status?

Good question. You were in 'CoS pending' status. Or, if you continued working, you were in H-1B, with CoS pending.

Can soomeone tell me that CBP or Department of Homeland Security...?

The I-831 is merely a continuation page. But, yes, it will be shared between multiple agencies.

Can a person who isn't legally in the US but is a family member enroll a child US citizen and is coming from Mexico in school?

If the parents are in Mexico, it will be difficult to get them to sign before a Notary inside of the US. Also, this needs to be a 'real' Notary...

For US citizenship, should I use 5 yrs in GC or 3 yrs being married to a citizen? got my GC through work before marriage.

It is up to you 2. If you use the 3 year rule your spouse will need to go to the interview and you'll need to show that you 2 have been living...

Pending I-485 living outside of USA with L1/L2 visa

You can not file form I-485 from outside of the US. But, if you come to the US, file the I-485 forms, this might be possible .... if Canada lets...

Do I still need to file the forms to satisfy the "Seek to Acquire" requirement even if my name is in the invoice and paid fees?

What 'seek to acquire' are you talking about? Are you talking about the law that allows DOS to cancel an immigrant file if they don't seek to...

Reentry to US?

I agree with my colleague. 1.) They can file for the SB-1 and try to convince the Consular officer that they really couldn't leave their...

As long as you don't send any money from the US to India and you use 100% funds from a bank in India, and keep all the profits in India ... you're...

Will my husband receiving SNAP benefits for himself and our kids affect me when I apply to become a permanent resident?

My colleague is correct, a CPR filing form 751 is not subject to this rule

3 Questions - Requesting for Answers

Since you didn't use "?" question marks, it is a bit difficult to find your 3 questions. Let's see how successful I am: Q 1: So I would like...