In the Ultimate Magic book, many of the archetypes have new features that add spells to the alchemist's formula book as an Xth level extract, and all have the same wording. An example being the Clone Master...
At 7th level, a clone master adds lesser simulacrum to his formula book as a 3rd-level extract.
By the wording, does this mean:
1) The alchemist considers this spell to be among their "extract/spell list" or "spells known" for the purpose of being able to copy the spell from a wizard's spellbook or from scrolls?
2) If are not considered part of the alchemist's extract/spell list, would the alchemist just be unable to ever get that extract/spell back if their formula book is lost or destroyed?
3) Lastly, if these spells are considered part of the alchemist's extracts/spells known, would this modify the alchemist's "class ability/feature" in such a way that this archetype wouldn't stack with other archetypes that do the same [1]?
([1]: https://paizo.com/paizo/faq/v5748nruor1fn#v5748eaic9thg)