The formula has six notes in it. In theory everything should work out just perfectly. But we're not all laboratory scientists who believe solely in that concept. I told you in the Music Theory page that theory is like math. Well right now a Jimmy Buffet song is playing in my head.
Practical application needs to be considered here too.
A guitarist, for example, uses his four fingers on his left hand to finger the notes. Maybe too, it's impossible to get all the 'formula' in any kind of good sounding order without going into muscle spasms when trying it. Another thing to consider, and probably more importantly, is how the chord is going to sound. This leads us into proper placement of the notes and careful attention to what's absolutely needed as far as theory of the formula, and what we can 'kick out' in order to have a pleasant sounding chord without any sour notes to deal with. Let's zero in on that ugly 13th chord again.