All albums seem to have a creation date of Aug 2009. These albums were imported from vBulletin 3.x however I can't confirm right now if the source data had in fact those 5,487 identical empty albums for the member or if it was a migration error (I didn't got any error message during the migration, everything went perfectly fine using the XF standard importer and then the XMG standard importer). I guess I'll need to restore my old vBulletin backup in order to further investigate this problem.
The member is banned so he isn't being listed at the Notable Members list under the Most Albums tab.
Could you please provide me a query to list the top 10 members with the highest albums count regardless if they are banned or not? This will help me to find any other similar occurrence to further investigate.