Okay so I think you are on 1.5 App Store version, the reason this is happening which will prioritise the nostr address check mark in the feed/post views, even if you follow them. The behaviour has changed in new versions of 1.6 (not out yet) because it was using up way too much bandwidth. So for now you will see the circle check, but when 1.6 is out you will see the following person icon, even if they have a nostr address, until u tap on their profile