it looks likr your checkout page has become corrupted.
I would suggest downloading a fresh copy of the power store files and using the ffrexh checkout page from the new download.
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.