Mailing List issue with Checkout

For some reason I am having a new issue with my Mailing List functionality.



When a user creates a new profile, and signs up for any of my 3 mailing lists, everything works just fine.



However, when a user is checking out (for a purchase) and signs up for any of my 3 mailing lists, their name/email is NOT added to the mailing list campaigns (and when you view their profile is shows that they are not signed up).



I have tried this with a bunch of test profiles/transactions at this is indeed what is happening.



Has anyone had this issue, or know what might be causing it?



I did install a SSL a few weeks back. Could this be causing the issue with the mailing list in the checkout process?



Thank you for your help with this!



My site is letstalkchef.com.

Anyone?

what?