I think there is some confusion here. There is no desktop link in Start8, but there is a games explorer link and Server 2012 lacks this which is causing the OS to report the title as "Desktop" as that's the string the OS returns for unknown virtual folders.
To resolve this issue simply disable the games link in Start8 on the configure page.
I will make sure future updates hide that option on Server OSes.
If you wish to make a shortcut to desktop you can use the advanced option in Start8 to create a right hand list entry to point to that location.