The log of deleted files are files deleted in the shares, not files deleted from the Recycle.Bin folder by the plugin command.
I am testing one thing I don't like in the script, but I'm not sure it is affecting the removal of aged files.
The aged files are determined by the 'find' command, not what 'stat' shows. The age days of 4 would I think be files that are over 4 days old, not exactly 4 days old.
I think you might be over analyzing this.