ADCS 2012 CAExchange certificate renewal

Hi

My Active Directory Certificate Services appears to be functioning correctly but I have a quick question about the CAExchange Certificate automatic renewal and validity period. If you look at the image below you will see the 442 CA Exchange Cert has a an expiration date and time of 04/08/2014 09:20 and the 448 cert has an effective date and time of 06/08/2014 09:56

This means that for 2 days the CA has an expired CA Exchange Cert?? am I missing something.

Thanks

Simon