wow, this is just getting more and more ridiculous. well, as i said in the other thread, i was in the same situation, and the officer told me at the first interview to toss the second notice. "clerical mistake, it's the government, you know," he joked. anyways, your green card is approved, that's not going to change, so if i were you, i would write a letter (since calling does no good) to both offices explaining the situation, save copies of both to cover your butt, and then forget about the whole thing. unless you live really close by the office where the last letter tells you to go, then you could just go for the heck of it. but i think that the bottom line is that you have your green card now, no more interviews needed.