So if I understand you, I booked under a fare type U-UP which I did not know was technically possible. I found my tickets and they list the fare to be UA14UWNQ and I did a google search which resulted in this flyertalk posting:
http://www.flyertalk.com/forum/archive/t-1351123.html

Coincidentally, I booked near the same timing as the posting in the link.

Thanks.