Interesting. The "try it 3 times in a row with no changes" technique worked.

The bad news is the flight is priced as a muti-city and comes out $200 more than the same itinerary on Orbitz when priced as a round trip. The other flights offered under multi-city also come out $200 more than the same round trip itineraries on ual.com.

Maybe I should just try tomorrow and see if it works a a round trip.