Google Checkout missing from My Cart page in wp-ecommerce

I work for a non-profit org for kids using the latest versions of Google API, WordPress, and the wp-ecommerce plugin.

Google Checkout (button) is missing from any instance of the “checkout” or “my cart” page on my site. The button successfully populates in the sidebar WIDGET, but only when it is on certain pages on the site. When I click “purchase” (a link present on the My Cart page) it simple re-loads the my cart page and does not take you to Google Checkout. There is no button.

-I used the API Callback URL that is specified in the Settings for wp-ecommerce.

-I made sure that Google is accepting unsigned carts.

-The other information I entered was double and triple-checked.

-We CAN successfully get you to Google Checkout whenever I do see the button, but it’s not always present in the proper places.

The site in question is at https://www.stokesfoundation.org and I put it in Google Sandbox mode. Please help!

Clearly… What I need to happen is that the Widget will have the Google Checkout button on all pages of the site while a user is on the website. Also, when you go to “My Cart” there should be a google checkout button/option on the bottom, right?