To Always ask
You’re making a great point and I’d like to expand on it. When Rav Yaakov said that Moshiach would come from Rabbi Auerbach’s yeshiva he wasn’t stating a prophecy, or even making a prediction. Rather he was trying to impress on people that Moshiach will bring all Jews together and so a Yeshiva that meets the needs of Ashkenazim and Sefardim is what Hashem is looking for. In contrast, Lubavichers believe that the Rebbe was a Novi and so they take each of his words Kipshuto. That’s why they twist themselves into a pretzel trying to resolve his contradictory statements.