Maybe its linked with the global setting delete objects, but im not sure about that.
I've done a domain migration and all the orphaned content was saved in vROPs. It was a hell of a job to get it all back to the correct users/groups. But the data remained in vROPs.
I set the delete object to 1 hour, and now 1 hour later the orphaned content is still there. Do you have sufficient permissions to view orphaned content?