To answer the question about what you do in a paid D class RTW on UA 2 class domestic, I refer you to this rule (ie: RUdi, I think you were ticketed incorrectly!):
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">
)IN THE CASE WHERE THE CLASS OF SERVICE FOR WHICH
THE PASSENGER HAS PAID IS N O T AVAILABLE
OVER A PARTICULAR PORTION OF THE ITINERARY
AT THE TIME OF RESERVATIONS - THE PASSENGER WILL
BE BOOKED/ACCOMMODATED IN THE NEXT LOWER CLASS
OF SERVICE AND N O REFUND SHALL APPLY-EXCEPTION
ON SECTORS WITHIN/BETWEEN CONTINENTAL USA/
CANADA WHERE N O BUSINESS CLASS IS OFFERED
AT TIME OF BOOKING - PASSENGERS MAY TRAVEL IN
FIRST CLASS (SUBJECT TO AVAILABILITY).
</font>
Of course SFO-OGG is likely not considered part of "Continental USA"
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RichardMEL, UA 1K
A Star Alliance Member.
[This message has been edited by RichardMEL (edited 10-16-2001).]