Can't find my backed up files for one of three computers

We were running Norton 360 version 4 on two computers. Only one computer showed up at https://nobu.backup.com/. both computers showed backed up in the backup protected screen when clicking on the desktop icon. Thinking the problem was lack of storage, we upgraded to the premier edition and added a third computer. The problem remained. Since add a computer shows up on https://nobu.backup.com/ I clicked that tab from the third computer. After downloading, a pop up said I had a backup already running so I canceled. However the third computer does show up at https://nobu.backup.com/ Thinking that would resolve the problem with computer #2, I did the same thing and it still does not show at https://nobu.backup.com/
 
When I click on the desktop icon and then restore files it does show computer #2 with 1.5 gig backed up. Where is it stored?