Decans on the rosette, 1st sphere

[Searcher]

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1.  Sphere 1 I have identified with the Hermeticum Nous (sometimes called Cosmos), or demiurge god of Intelligence/Mind who created the heavens and world with the Word, Sphere 3, who called up and created the forms of the world from earth/water elemental matter, and the world itself, and named them (hence the earth symbol above #3, which is for the diagram's purposes shot towards the centre #5 and the world comes into existence).  
Nous's number is actually 1 or 10 so that numerology worked.  He is also called Cosmos, btw, and I like that better so maybe will call him that. 
So I believe Aeon is represented by the decans lining the inside of that sphere.
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So (exhausted, and thanks for bearing with me, I needed to get that out), why do YOU think there are 13 petals in Sphere #2?  That sphere should represent the zodiac and the heavens - I still believe it does - but the 13 instead of 12 is curious, just like 37 was.  I know there was a 13th constellation - so did the ancients, it's not something newly discovered as some accounts claim - but it trips me up.  
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First of all, maybe I missed something, but I think the Nous is not the Cosmos. 
I have never come across 37 deсans mentioned. Of course, there are references to 37 kings, but this doesn't mean that they imply deсans. In theory, if they are mythical, they could represent 36 deсans and 1 ruling center, as in the case of the 12 aeons and the 13th aeon, but then some mention of one particular ruler must be found. For example, I have met only information about several rulers.  In fact, the 37 kings might also mean 37 lunar months. 
I would note that the number thirteen may have a few meanings, including: 
1. 13 lunar months a year;
2. 13 aeons;
3. 13 veils of the Jewish Temple;
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The 13 aeons are the 13 obstacles or torments of the soul on the way to Pleroma in some Gnostic teachings, the 13 veils rather also mean veils of the material world on the way to the Most Holy. Also I can mention the later masonic pyramid with the 13 levels which, as I think, have quite the same meaning.