Duplicate backup set

There is a duplicate back up data set at https://nobu.backup.com/

The backup is now at 101%, so I can't back up my files. It won’t let me delete/remove the backup set. When I go to Remove Computer no computers are listed. So I can't remove the duplicate set.

Also, I don't have the option to purge files from the online backup (these are both things I should be able to do according to the information in the "help" section online).

 

How can I get the duplicate data set removed or deleted so I can back up?

 

Thanks