I am not sure if the import from the backup messed something up, but I have a domain with a drupal install and it isn't showing the application being installed via plesk.
How to I get plesk to see the install without having to reinstall it?
If the issue still exists afterwards, please try to investigate the issue with your Plesk Control Panel logs and consider using as well a debug mode level for it, to get additional informations in your log - files, if the standard log - level doesn't help.
If the "mess" is caused by any backup, please investigate as well the backup - logs... they are very detailed and will point to issues/failures/problems.