Even if you graduated your courses and you should be able to download your Graduation Certificates in My Certificates section, sometimes browsers display a webpage using their local cache - this means that the browser won't download the page from the server and you won't see the updated version of the page.
This could happen to the My Certificates page from My Account, too.
You can refresh the webpage using the following steps:
On a Windows PC: Open the page My Certificates in your browser - then press Ctrl-F5 (hold down the “Ctrl” key and then, while still holding it, press the “F5” key on your computer's keyboard). You should see your browser screen refresh.
On a Mac: Open the page My Certificates in your browser and press Command-R (hold down the “Command” key and then, while still holding it, press the “R” key on your computer's keyboard). You should see your browser screen refresh.
Now you should see the updated page that contains the link to download the Graduation Certificate and the options to order the printed International Certification.