In the case of Aftersend Solo and Team, you can only track an email, not a recipient. This means that if you send an email to three recipients, then you will see the combined open and click events for those three recipients.
In the case of Aftersend Enterprise, we are able to offer per-recipient tracking. This means you are able to send one email to three recipients and see a breakdown of which recipient has opened the email and clicked links within it.