Originally Posted by
bob_the_d
ah good to know. i think this particular one mapped up fine as it showed up on my co.com account page and is listed as L.
it even has a CO confirmation code (i find that a little odd) and doesn't mention bmi anywhere on it. it really looks as if i booked it straight through continental. even when i requested a receipt it's all CO and doesn't mention bmi anywhere.
...maybe it'll accidentally throw another 5 bucks into my co club account too.

It will have the CO PNR because that's needed by CO to track the reservation in their systems. That is completely normal. I am in MXP right now awaiting a connection to BDS. The flight was ticketed on AZ stock with the TATL segment operated by CO as a UA codeshare. I have three different PNRs for the same flight.
It is also worth noting that the L->L mapping is based on the new BD codes that take effect April 1 to align with the Lufty codes. Today BD L is actually a rather high fare class.