Yes, I understood this. I was just suggesting a quick alternative because it's a matter of two seconds to empty the trashcan
Check, by FTP or by the plugin DreamExplorer, if some orphans file are in the /media/hdd/movie folder and delete them all. Sometimes, the real recording, the .ts file, has been deleted but some other files remain as orphans and the trash appear not to be empty.
Also, as a try, disable the automatic deleting, restart the GUI and then enable it back.