OK, don't know if this helps any, but saw another strange anomaly last night. Mr Fish is traveling on this itinerary this week:
1/26 EWR-IAH H CLASS (737)
1/26 IAH-DFW Q CLASS (RJ145 - SINGLE CLASS)
1/29 DFW-IAH Q CLASS (735)
1/29 IAH-EWR H CLASS (753)
So, I looked at the res last night to see if he was in M, B, or Y (for upgrades), which he wasn't. Clicked on the top of screen for "Upgrade Reservation". Under the "Buy Up to First" section, it offered $119 for outbound (1 leg upgradeable), and $131 for return (2 legs upgradeable), or $172 for BOTH outbound and return (3 legs total). Is this because of the difference between a OW vs RT in M/B/Y? BTW, the EWR-IAH and IAH-EWR flights were showing "waitlist only" for mileage upgrades - don't M and B upgrades come out of the same bucket as mileage upgrades? If so, then the difference would have to be the diff in OW vs RT in Y, right? $172 RT EWR-DFW seems like a small price to pay from H/Q/Q/H to Y. I am getting more confused by the minute.....
Edited to add: He was EUA'd for the outbound flight. Now it's showing the return available for $141 upgrade for the two flights, up $10 from yesterday (still waitlist only for mileage upgrade IAH-EWR).. Go figure..
Robin