Yes, the View Cart button code is unique to your own cart account but the same for all of your products, so you just need to make sure that every page that has any Add to Cart buttons also has at least one complete block of View Cart button code as well. Taking a look at your page, I notice the View Cart code is incomplete; you appear to be missing the SCRIPT lines that make the cart overlay screen actually function. Perhaps you inadvertently unchecked the box for Javascript button codes when you copied the View Cart code, or perhaps FrontPage did something strange after you pasted the code in HTML view. At any rate, you need to recopy your View Cart button code from our Seller Admin and re-paste that in to replace the View Cart button you have now.
Since FrontPage can switch between an HTML code view (where you can edit the code directly) and a visual-layout view (where you can see how the page looks and click/drag/cut'n'paste things around to reformat), make sure you are not visually moving buttons around after you have pasted-in the code; instead, you could first place the cursor in visual mode where you want the button to appear (maybe type some placeholder text there like "XXXXX"), then switch to HTML code view to paste-in your button code in that place.