[quote name='Vader582']Tell me about it. Why is it this stuff never adjusts on it's own???
Amazon has some great prices but this kind of crap is annoying.
The CSR said he couldn't give me the $2 credit back but instead added $2 credit for my next purchase. I can deal with that. I really wish these people knew their own policies though.

[/QUOTE]It's supposed to adjust on its own, though I've seen it work less than 100% of the time, which is why I email them.
Email them again, and include this URL in your email, which is the terms and conditions for their Pre-Order Price Guarantee:
http://www.amazon.com/gp/promotions/details/popup/AWT354OR7BM1U
For the link-lazy:
[quote name='Amazon.com T&C']Pre-order Price Guarantee
Amazon.com's price for not-yet-released items sometimes changes between the time the item is listed for sale and the time it is released and shipped.
Whenever you pre-order a book, CD, video, DVD, software, or video game, the price we charge when we ship it to you will be the lowest price offered by Amazon.com between the time you placed your order and the end of the day of the release date. A pre-order price guarantee message will appear on your Order Summary during the checkout process. If you use 1-Click ordering, pre-order price protection will be automatically applied. The order summary in Your Account will reflect the lowest price within 24 hours of the price change.
Terms and Conditions:
- Pre-order Price Guarantee applies only to items sold by Amazon.com, and not to items (or prices) offered by other sellers on our site. Does not apply to any products purchased at Amazon.com's other sites, including Amazon.co.uk, Amazon.de, Amazon.fr, Amazon.co.jp, Amazon.ca, or any other web site operated by Amazon.com or its affiliates.
- Pre-order Price Guarantee applies only to not-yet-released books, CDs, videos, DVDs, software, and video games sold by Amazon.com. It does not apply to other product lines or to items that have already been released.
- Pre-order Price Guarantee applies only to qualifying items displaying the offer message on their product detail pages. Items that do not display the offer message do not qualify, regardless of the nature of the items.
- If your order enters the shipping process before the release date and the price is lowered before the end of the day of the release date, we will automatically refund your credit card for the difference between the price you were charged and the release-date price. If you did not use a credit card to pay for your order, please contact Customer Service.
[/quote]Bolded sections are the ones of importance. In theory, it's supposed to auto-adjust and credit you back, though I've had numerous orders where they didn't auto-adjust it after the fact and I had to email them and complain until they did. I've found it's much better to do it in advance, on the day of the drop, so there's no question it being at the lowest price by the release date.
You're supposed to get that money back to your credit card, not as a future promotional credit. If you have no luck with the emails, call them. Make sure you have a screen cap of the price today, as backup.