boy nice, you are not aware that there are many kind of hadith-e-kisa one says that such event was act at hz. ayesha siddiqa ra residance, one says it was hz. hafsa ra residance and many says another mother of ummah but do beleived that what prophet pbuh says in his pbuh last sermon is most authentic one since ravi of such even is more then 100 thousands.
hope answer the question.
Who are you to declare anything "more authentic" than the other? Do you personally have any authority? And yes I know that verse of purification was revealed several times and each time, the people to be addressed in the verse were same, and if you have any tradition contrary to the fact, you are free to bring it here, otherwise your personal arguments is not going to make any difference.