Some of the questions are answered on the CB site, but they are somewhat buried/scattered there.
* How many Subject SATs (SAT IIs) should I take?
* Should I take SAT II Math 1, or Math 2, or both?
* Do colleges see/consider the PSAT scores?
* Do colleges see/consider pre-junior SAT scores?
* Is ACT easier/more difficult than SAT?
* Can I cancel one/two SAT IIs out of two/three I took in one day?
* If I registered for the SAT Reasoning (SAT I) Test, can I take the Subject Test(s), and visa versa?
* Can I take more/less/different SAT IIs than I registered for?
* Is stand-by guaranteed?
* Is CB online course good?
* What is the Blue Book?
* What is QAS?
* What is SAS?
* What's hand scoring?
* Can I get a copy of my answer sheet?
* Why are my scores delayed?
* Can I use a mechanical pencil? Not a #2?
* Who is tokenadult?

(not really a mystery

).
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This FAQs idea is great. If implemented, it might significantly reduce the traffic on CC and save grief to the future SAT-taking generations. (One day there won't be the SAT I. Oh, wishful thinking...)