Wow. That was some bad, bad web design. I went to purchase some fine paizo products. I got to checkout. Credit card out of date. Okay. Put in new credit card number. Whats this, select address. Okay. Old address. WHAT?! Credit card info cleared, have to re-key. Click order.
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What is this screen? Its some gobbledigook and a link for "If you are not slaughterwombat".
Check cart. Cart still full.
Try to check out again. Card declined (I know its good).
Okay. I quit.
1)Ask for address first, or don't reset credit card data when you put in the address.
2)If the order process goes sideways, have a screen that explains what happened and how to get back on track.