User in Permission "Loading..." has become "_spotlight"?
Check the folder with ls -le /Users/&lt;user_name&gt;/Documents/&lt;folder_name&gt; and you will see that _spotlight just indicates an ACL. The real owner:group is root:staff. Adding an ACL for the user _spotlight is sometimes necessary to allow (or disallow) the indexing of a folder for the Spotlight search database. 

Depending on your system version you may get a similar result checking the /Applications folder:

ls -dle /Applications
drwxrwxr-x+ 84 root  admin  - 2856 23 Jan 20:34 /Applications
 0: group:everyone deny delete
 1: user:_spotlight inherited allow list,search,file_inherit,directory_inherit