They are separate npubs for different pseudonyms, use cases or online identities.

Yeah but there are only two here vs 3 or 4 so i don't understand the connections or if im thinking of your diagram wrong.

Because not every profile may be used for Nostr at all and is a choice. For example, Google play / work / personal apps may belong in their own space away from bitcoin / nostr stuff. Google Play private space on the bottom right has no Nostr signer app installed there then

Yeah. But why would the owner profile and the user profile share an npub?

not intentional, uploading a fix rn

Thought so! Wqs just making sure their wasnt some use case i wasnt thinking of

fix'd