I am running a report on a test folder with some test .txt documents and i am getting no user information next to some actions. Example...

A file "document.txt" was moved from the folder i am reporting on to a sub folder. In the report next to this message i see "File '\\SHARE\FOLDER\document.txt' was created by '-'."  The "accessed by" column is also blank.

Some new documents created also show the message was created by '-' and no "accessed by" details also.

Is this normal behavior? All other file/folder changes within the reporting folder report back OK with correct user details.