This is because your internet browser has saved large files in your cache for quick access. It currently shows the old one. If you would like to see the new one you will have to delete this cache. Follow this link for the instructions on how to do this on your particular internet browser;'s-Cache

Or, you can open the certificate in a different browser, such as Google ChromeMozilla Firefox, or Internet Explorer and typing in the link with your particular order number, for example whereas the 10212 is your order number.