See? I didn't know that! Thank you.
My experience has been 2 IG vinyl, and my Intex.
With what Johnnysnok has shown, it is just the opposite.
So with that, try laying it out with 4 long on one side, then medium, short, short, medium around an end then the other 4 long..... you get the idea. Then see if the posts all line up at each of the joints, and across from each other.
That's what it looks like in Johnysnok's pics, anyway. His endwalls are not equidistant between the posts, but the sidewalls are.