Does your backup schedule at correct times? Also what time zone do you have set in Plesk Control Panel as I have GMT +00:00
maybe I should yum remove and re-install, to re-install do I just run Plesk Update from Control Panel again?
Also are you able to click the disk icon to download backups??? as mine gives FTP Network Error but I am using a remote ftp site for backups as setup in FTP Server Repository.