yeah, the npub that you'll receive (the connection string, which looks like bunker://npub...) is an independent npub, is the npub of your bunker

these are the npubs:

admin npub: the npub YOU can use to administrate the bunker

bunker npub: a new npub generated just for you to administrate your bunker

target npub: the npub you want to sign as

(most often admin npub and target npub are the same, but a company might have multiple admins for their "coca-cola" target npub 😉)