"Snapshots>All snapshots" not showing any backups

I have had snapshot running on my multi site for a long time, today was the first day that I needed it, made a mistake and messed up a site. Went to restore from a snapshot but none exist.

When I look in my snapshots folder using FTP I see my daily snapshot zip files.

How do I restore just this one site to the last snapshot?

Thanks in advance,
Chris