I occasionly export a users workbooks and import them to another user by editting the .eex file, changing old username to new username. Recently, I attempted to do this, but even though I check the button 'only take ownership if original owner cannot be found', the workbooks were imported to the adminstrative user I was logged in as. I thought maybe a jre issue might cause some strange effects in Discoverer Plus, but that has not changed. Could maybe a permissions setting be set incorrectly?
Yes you would think and maybe you've hit the head on the nail.
You say the previous owner's username has been deleted? Presumably you recreated the user account and tried importing against that user? This won't work because the system is keyed on the USER_ID not the user name. Unless you are able to get the same USER_ID in place the import will not recognize that the user exists and will assign ownership to the person doing the importing.
One more thing that springs to mind, from the dark recesses, is to try granting the user temporary admin rights then import when logged in as that user.