Originally Posted by
findark
Given your results, I am presuming you searched, as part of the multicity, IAH to PEK? This will cause Expert Mode to show the (married) inventory for UA527 X/ORD UA851 for both flights. This is related to but NOT the same as the inventory for either individual flight. Upgrades, however, should clear on a per-segment basis. I expect if you search UA851 as a separate flight (ORD to PEK), you would see R9. If you give the date I could dig more.
You've correctly identified the issue - searching for R on a multi-segment itinerary.
It's not a
married inventory" issue though. It's a display issue. If it were a married segment issue, you would not be able to clear into R for the single segment.
(and sorry for the nit, but I'm on a crusade against over-use of the married segment nomenclature)