However with Yetzirah, or Briah, or Atzilut, this isn't the way it works. Because one who has the source of his Ruach in Malchut of Yetzirah, and he rectifies and completes this level, then he will merit and be able to rectify Yesod of Yetzirah. So, he will ALSO receive a Ruach from Yesod of Yetzirah, and the first Ruach that he had which was at the level of Machut of Yetzirah remains below at Malchut of Yetzirah because that is its' place.
And similarly if he completes also Hod of Yetzirah -- he will have one Ruach from Yesod of Yetzirah, and a second Ruach from Hod of Yetzirah. This is the way it is all the way to Keter of Yetzirah. When he rectifies his Nefesh in all of the levels of Asiyah, he is able to receive a Ruach from each of the levels of Yetzirah, and so too with the level of Neshama which is from Beriah....