BPs on AF/KL/AZ tend not to show the actual class paid, in my experience. Right now, AF/KL have just aligned fare buckets, so you've got the mess of some fares that were booked before the alignment for later travel, so the bucket might have been remapped or not. On an award ticket, I'd expect DL's systems to get it right in the end (unfortunately for you). It does take a couple of days for partner flights to post, of course.