I've yet to thoroughly explore the Lost Sanctum at this point, but from what I gather at this early stage in the game's life, there are probably a lot of things we don't know about in regards to the Sanctum right now that will probably come to light after a large group of people have completed it.
I imagine any guide that's been made this early on will undergo a large amount of revisions before it's completely accurate, which is no fault of the excellent people who put the first efforts forth.