Why are my statistics different for unsubscriptions and link clicks?

If you use one-click unsubscribe headers, these are counted separately from link clicks. When a contact uses the one-click unsubscribe header, it does not appear in the link analysis, but the unsubscribe itself is tracked and displayed.

For example, if you have 10 unsubscriptions and 7 clicks, 3 readers may have used the header. You can confirm these numbers using a Raw Data Export and exporting the message statistics.