If you are on 1.5 App Store release, the circle check means they have nip05 verification(nostr address) and the person checkmark means you follow them, there’s a few different person checkmarks. One means you follow them, one means they follow you, and one means you follow each other. If you are on 1.6 TestFlight, the circle checkmarks will not show up in the feed, they will only load if you go into someone’s profile.
Discussion
For example, you can see i do not follow orange bill, there is no icon after his username, the others i do follow 
🤣🤣🤣🤣🤣🤣🤣
I see both person and circle and I follow both.
Send a screenshot? Maybe I’m wrong with some of it :)
Yea let me find it first
Okkkk🫡
Following both https://nostr.build/av/31c27300dd0e16e27691b9b9d6306b4ede6f27ff5ac550878a2ef8dd57fbc9f5.mov
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