Snapshot is backing up on local and dropbox but not setup that way. How can I fix that?

Hello friends!

Ok so I setup Snapshot to back my websites up on Dropbox. I did not chose a local backup option. For some reason I see recent backups on my server. Is that normal? I need to clear some space on my server, so I'll be removing all backups immediately (since I have a duplicate on DropBox).

Thanks in advance,

Paul