Hi, it's correct, unconfirmed is when a subscriber subscribes but does not complete the subscription activating it (when the double opt-in is active) while unsubscribed is when it asks to not receive newsletters anymore.
Both the unconfirmed and unsubscribed DO NOT receive the newsletter, there is a main filter to avoid that.
When someone clicks the unsubscribe link, it is directed to the dedicated newsletter page the one configured in the Newsletter main settings,a nd that page needs to contain only the [newsletter] shortcode otherwise the messages are not shown correctly.