Last night I booked a MR trip on CO.com while logged in to my account. The trip I booked is Y-class AUS-IAH-AUS and the Y-up logo was showing with the two legs I booked. As I completed the itin, though, I was never offered a chance to upgrade and the seats I was assigned were in Y.

Once the ticketing finalized I called the Elite desk and asked about upgrading and was told that there were no upgrades available. Today I called again (and didn't have my PNR# with me) and found out that my OP # was not on my itin. The agent added the OP# and I upgraded immediately on both flights.

I can't recall the CO.com ticketing system dropping my OP# before. I know I was logged in because I didn't have to enter any pax or billing info.