Thanks Richard .. this thread is so ancient, did not trawl back to the older posts!
But, ummm, wasn't that the flight that United audited and took back, and that tipped you UNDER the "1K lite" mile level, and then they ummm .... sent you a downgraded 1P card instead??
http://www.flyertalk.com/forum/Forum50/HTML/005862.html
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Glen ~