This sounds like what we have encountered, ie Delta and AF are not really `code share,` but more like a `divorce code` ( ie dont talk to your x spouse .
We have not logged 8 calls to Delta and AF all with the same result, you have to wait until you check in at the airport. It is ironic that when I login to the AF FF site and try to select a seat, AF advertises seat upgrades, yet I can't even select an `upgrade.` Now that's the dumbest marketing mistake I can think of. DL and AF never heard the saying ` make is easy to take the customers money.`
I did visit with one traveler who said AF will do this intentionally so they can `upsell` you a seat at the airport. Sorry folks, but for a business traveler this just `turns me off to giving AF any more of my time or money.`