I am confused on this. in formation 3A There are two formation Cs shown: a dark colored and a light colored. They are different...

I am confused on this. in formation 3A There are two formation "C"s shown: a dark colored and a light colored. They are different formations and cannot be designate by the same letter. I hereby reassign the "light-colored Formation C" to be Formation "O". The dark Formation "C" stays as is ("C"). would the order be S,T