See below link
https://www.answering-islam.org/Green/seven.htm
I can't understand what you mean but in the first years of Islam they memorized Quran. When I say Osman, I mean during Osman governor he order to create single Quran with clear order and number of Sureh.
That is what they teach me when I was very younger. I could not remember completely everything that they said to us.
So if Uthman ordered it then it should be credited to Uthman for compiling the Quran. He was one of the earliest ones to memorize the Quran.
I think the website is about different way of writing arabic text which is understandable since they write it differently even still. I do not understand why number of chapters would change.
So it is now established that Uthman compiled the Quran as service to Allah and may Allah reward him for that.