Issue: Attachments vs File Upload Manager

Settings > Miscellaneous > Attachments > "You are currently using 1.49 MB to store 1 uploaded attachments"
My only file is 281.1 KB

My Profile > Album > Upload Photos > "1. Click Add Files to upload new files or select from existing files below"
There are actually 18 files using 1.49 MB

How come it only shows one file in Attachments?
How can I delete the other 17 from File Upload Manager?