yeah, shipping wily be updated when going from checkout to confirm, if they add other items, it wont recalculate untill they go back through the checkout to the confirm page.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.