Derek's contact info is still on their website... try calling him? http://www.anastasiascollectibles.com/
It's listed under the "Contact" page. It's a 714 area code number.
As far as the price you paid... I'm going to assume they submitted it under the "Standard" tier which is for books valued over $300 but less than $1000. The cost for that tier is $65 plus invoice fees and Anastasia's "facilitator fee" ... that puts you at like $85. AND IF YOU HAD IT PRESSED before grading then a book in that tier costs an additional $65 from CCS. So, that plus return shipping could get you all the way up to $150-160. Now, all that being said, if the book wasn't in NM- (9.2) or lower condition than you should have submitted it under the "Value" tier and could have saved on the pressing too and got the grading and pressing done for under $100, if memory serves me correctly.
**CGC doesn't list their Sig Series pricing on the website anymore, so number are all approximate**