Last Virus Scan Date Is Wrong

Hi I am running Bitdefender total security 2012 on a windows 7 64 bit computer.

I have had Bitdefender running for a few months now, but in the last few weeks I have noticed a problem after I have done a full virus scan the date of the last scan does not update itself, I did a full scan today and Bitdefender says the last scan was 13 days ago, as per screen shot.

Has anyone got any ideas as to what’s wrong please.