Well I finally got around to using the system flush and it seems to have done the trick thanks.
After it had done it's magic I had to do a rescan for channels, and then assumed the auto schedule restore would kick in and do it's stuff.
However the restore schedule isn't working. I have tried 3 or 4 times now. If I click 'view backup' then everything is there, and I reboot the unit using the button on screen (and on the unit) , it runs through everything as normal but doesn't apply any of the schedule.
Has anyone got any clues please, it's not the end of the world to recreate my favourites list and set up any recordings, but it'd be nice to know what has gone wrong.
Thanks in advance!