NSC does not always update the Automatic Message System on a timely basis -
My wife and I went to the Center in Detroit for both our FPs on April 19, 2001. One month later when I called with my wife's LIN number it said her FP was receipted on April 24, 2001 and that processing had resumed on this case - But when I punched in my LIN it said an FP notice went out to you on March blah,Blah, Blah... It took a good 3 months for my LIN to reflect my FP receipt date (April 24, 2001).
So hang tight, dont panic and keep checking .... I am sure they will get around to updating your information eventually!!!