“It is one thing to follow the first answer in Tosafos when there is only one Tosafos on the subject, but here there are many. Tosafos in Yevamos 45b, says ???? ???? ????? ????.”
I never said anyone should follow any Tosafos. I am simply giving some sources about women sarving in some form of dayanus/horaah. The fact that there is a machlokes between different Tosafosin doesn’t change the fact that there is a Tosafos which holds that a woman can be a dayan. (By the way Tosafos in Bava Kamma 15a gives the same answer; I only quoted the one from Niddah because it was more clear.) Additionally I would point out that there are two seperate questions being addressed by these Tosafosin. One is from the drasha that equates men and women, and one is from Devorah. The Tosafos in Yevamos only asks the second question which can be answered by giving a sevara specific to Devorah. Had the first question been asked, the answers given would not have sufficed. I will grant though that the Tosafos in Shavuos does ask the first question and gives a different answer. However, like I said that just makes it that there is a Tosafos in Shavuos on one side and a Tosafos in Niddah and a Tosafos in Bava Kamma on the other side (with the alternate answers in Niddah and Bava Kamma being on the side of Shavuos).