Amazon Patent (Score 2)

Just reading through the patent I noticed one or two things

1. The patent is only valid for a system returning HTML? I guess a system returning XML wouldn't be covered.
2. It's only valid if it outputs (partially) my id, billing and shipping address when I'm done?
3. Amazon takes my name / address / payment details, issues me a cookie and from there on in does everything automagically whenever I click / highlight / press on a button? Does this mean that if I change the cookie somebody else will get billed for and have delivered 4000 copies of the Kama Sutra?
4. I'm also a bit curious how in sections 6 and 9 the client and server systems respectivly include shopping cart components, yet section 11 (the actual method) specifically says "the item is ordered independently of a shopping cart model"

If anybody can clear these up....