My PC device appears twice in device list

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http://askubuntu.com – I installed Ubuntu and I already have an Ubuntu One account. Then I go to the Ubuntu one application in Ubuntu and register my existing account. At this time Tomboy Notes are not synchronized, so I go to Tomboy preferences and set up the synchronize server to Tomboy Web, and Tomboy asks for web authorization... then I synchronize notes but my machine gets listed twice in the device list, but with different names.... I think Ubuntu One should know about my notes and synchronize them automatically... in Ubuntu One setup application I do not see any Note option for doing that. How do i get only (HowTos)