Does this refer to the alteration of the Ghadeer Khum event?
I actually happen to run across a discussion on this on the Madani cable channel some months back...Wish I had recorded it.
To be honest I don't know much about Qadiriyya, they are a sufi sect who follow Abdul Qadir Al Gilani (born 1077 CE).
How come they continue their chain of light after Ali Ridha with Maruf Karkhi?
I read on wikipedia he maintained the teachings of his master Dawud Ta'i.
I personally agree with you in a lot of your scepticism although not necessarily with your conclusions.
Please tell me more about this very early Qadiriyya Razawi material.