The numbering of the sefiroth above is based on the principle that when Keter is counted Daath is not, and when Daath is counted Keter is not: 10 not 9, 10 not 11. (Interesting expression - one is tempted to interpret it arithmatically as:
ten not nine = 10 - 9 = 1
ten not eleven = 10 - 11= -1
and 1-1=0... Ten Sefiroth of Nothingness).
quote:
“24. Sometimes instead of Keter, Daat is enumerated amongst the sefirot. The GR"A explained that the inclusion of Keter reflects the inner aspect, while the inclusion of Daat, reflects the external aspect.
"25. This is because the quality of Keter - Great Mercy is not presently revealed. It will only be fully realized in the world to come. This is indicated by the divine name E-H-EY-E-H - "I will be," in the future tense, meaning, "I am destined to be" - after the six thousandth year of creation. Since the conduct toward the world is preparatory to G-d's ultimate intent of benefiting all, Keter, though concealed, is its underlying and motivating force, as stated in the Talmud, "Everything that the Merciful One does is for the good." For this reason, Keter is only counted in respect to the hidden inner aspect but regarding the external aspect, Daat is counted instead, since it represents that minute revelation of Keter in this world, on a lesser level. It is, therefore, centered under Chochmah (which is free of Judgement) and Binah (in which iscernments begin to arise) being a median conduct between them.
"26. All that is revealed and is known to us of Keter is that this world is preparatory to its revelation in the world to come. Accordingly, Keter is the root of all present conducts since it was G-d's original intent to reveal Keter through them - "The last deed being in the first thought."
"27. This explains the above statement that Keter is counted regarding the inner aspect, but regarding the external aspect, Daat is counted instead, and Keter is only considered the root. Keter is therefore called Ayn - Nothingness and Raysha D'Ayn - The Primal Nothingness, because we comprehend almost nothing of it. Accordingly, the GR"A states that, "revelation begins with Chochmah." The order of the sefirot would then be: Chochmah, Binah, Daat, Chesed, etc.”
End quote from The Beginning of Wisdom. A Compendium of Primary Kabbalistic Principles Translated by Rabbi Amiram Markel & Michoel Tzvi Wolkenfeld.