A small update on this - when I checked this morning, that other box (with my old mailing address) was gone entirely - there's just my Home address now and a button to change it (if needed). Just wanted to check if others see the same thing on their side as well.
If yes, then it means they either:
a) Fixed the issue when I sent the change address notification a few days after my AOR, or
b) (If this appears for everyone, not just for the folks that asked for their address to be updated) That they got so many complaints about it they finally decided to get rid of it entirely