Originally Posted by
SecurityTheaterFanClubPresident
Can someone please explain to me what is happening here?

For this codeshare there shouldn't be a seatmap loaded. Looks like for this flight for some reason a map is loaded for economy. (Looked in EF) Someone at DL screwed up. Thus I'm betting someone screwed up and input a code for DL to load a 753 map online. Note the Y map in EF shows ABC, DFG, and HJK for the seats. Doesn't align with the map shown above.