Motif Apparatus (Also called PD2) was designed to replace the original content of one of AtS's original endings, that being PD. This one is written much better and was designed with much more knowledge about web design, writing, and how to put together a better story.
It is more canon than the original PD, as it covers more things and also introduces a new character to the lore. Should this contradict anything in the original, this one is to be taken as canon.

This will be rewritten and incorporated into AtS once it is rewritten.