its not a bug if you view it after you click killspam it removes all story's and comments and changes the email to
blank@blank.com
if you want to change the name if its something DOMAINDOTCOM
login as god find the user in the User Management to edit info , name, email, password,
reset password to edit the profile information if needed
more found here
How do I edit or delete a user?
this is all over the pligg forums and google ;)
if you don't get a reply here most likely it because it has be posted and solved hope this helps