Reentry Permit

I came here June 2008 then got my green card on November 2010 and I am planning to go back to my country and will be staying there for 1 year and 11 months.(just enough for the permits 2 year limitation). But some parts of this article still bugs me, "Possession of a re-entry permit does not guarantee the alien’s readmission to the U.S." so on what reason and circumstances should this happen?

Is it possible for me to work outside the US (for the same company that I work for now) while on green card? My company has an office in India, and I have to travel to India for family reasons. I was planning to work in India for some time, and then come back in about a year and half and apply for citizenship. I have lived in the US for about 3 years on my green card now.

I got my GC on March 2006 and same time I got my Reentry Permit too. I was out of States within 2 years that I worked with US Forces Yokosuka Japan for Master Labor Contractor in less than 2 years. Is this form N-470 brand new rules?

I obtained my green card in 2004. I left US without obtaining a re-entry permit on July 2009 as I was out of job and found a job in India. Is it possible for me to get a re-entry permit to US? My wife is a US citizen, still working in US.

In a month I will have lived in the US for one year as PR. My company is sending me to do some work for them overseas.
1. Do I have to eligible for naturalization FIRST before I file N-470? Or is this just for any LP who have lived in the US for an uninterrupted year?
2. Can I file it while I am overseas?
3. Can I file when I come back having lived outside the US for less than a Year?
4. Can I file the application and leave BEFORE I hear back from USCIS?
5. What should my employer write in the supporting documents?
6. What makes my company an American corporation/firm?

I'm a U.S. citizen working overseas with the U.N. Can my wife (GC holder) use the N-470 to preserve her residency while staying overseas with me?

What is time frame to return to the U.S?

If you have a valid LPR and you went and stayed over 2 years in the philippines and you want to come back here. If you don't have a re-entry permit how can you get a re-entry permit?

If LPR has Valid Reentry permit can he/she EASILY reenter US, after absence of OVER two Years. Since it was processed late after application reentry permit is still valid for over two years of absence. Do they ask lot of questions at the port of entry since they have stayed above two years? or will they be allowed easily to reenter.

My husband is a LPR (since 1993) interested in applying for naturalization. He was granted a reentry permit and used it to enter the country nearly 2 years ago. How long does he have to wait to apply for naturalization?