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?
Good point. This is a widely misunderstood provision of law. Reentry permit is merely your official assertion: "I intend to keep my permanent residence." Usually, the govt. does not question this intention during the life of the RP. But if they want to make an issue of it, they can.