SONAR Definitions on Symantec Website don't match.

Since the majority of machines at our site are now up to 12.1.3, I have been asked to start downloading the SONAR Definitions from here: http://www.symantec.com/security_response/definitions.jsp?pid=sep1213 on a daily basis (yes, I realize that they are not updated daily). As I look at this link today: http://www.symantec.com/security_response/definitions.jsp?pid=sep1213 I see the current SONAR definitions to be the following:

But when I click on the "Definitions" link, I see that the version dates do not match by almost a month.

Is this common? I would assume that the webpage versions should match. No?

Any suggestions would be great...or if someone has the FTP site to grab the *-SONAR_IU_SEP.exe file directly, that would be even better.

Thanks for your time,

-Mike