Nono, I made you a picture lol.
I think enneagram has an inherent flaw in it somewhere, as it isn't perfectly symmetrical, and, thus, doesn't collapse back into itself. Realistically, if you split up reality, human minds, whatever into distinct categories, you should be able to freely recombine, resplit, recombine, etc. indefinitely. If you cannot, then you have a logical error, which is, essentially, in my views, what the various different systems are: evidence of an error in cognition that prevents reconciliation of parts.
Notice, if the original was symmetrical, it would perfectly overlap with the negative version next to it when combined.
In my own understandings and correlations and trying to peer through to the causation, in Socionics terms (sorry, just most familiar), this is the broken bridge between Ti (formal logic) and Fe (emotions), which I take to correlate with Rationalization being broken from Emotionalism in enneagram; that is, 5 and 4 not being part of the same point is broken logic, as Rationalization is always directly connected to Withdrawing and Emotions. Within Socionics, Ti and Fe are linked, but fail to recognize that they are the same thing as well, as reasoning is directly a manifestation of the emotions which produce such and decide which objective data is subjectively chosen to create these logic chains. So, in short, this "broke bridge" in enneagram is evident by the fact that reality is divided into parts within enneagram, but the gap between 5 and 4 keeps it from being infinitely repeatable and from collapsing back into "simply human."