on the failure page, you have applied the checkout rule access restriction, that rule should only be added to the login page, that rule is causing the failure page to redirect to the login 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.