Unusual Sunflower Bloom Structure!

This year I have well over 200 sunflower blooms in the garden–yellow, red, red-yellow, Honey Bears, Great Russians, etc.

One bloom in particular has fascinated me by its Structure …

Petals in the middle of the bloom???

A Sunflower Bronx Cheer??

If anyone can explain it PLEASE DO!!  Gardeners…PLEASE answer!!