User blog comment:Darkcloud1111/Good Idea, Bad Idea~Extracurricular/@comment-17099359-20140830020002/@comment-3146930-20140830035735

But at the same time, Jaune started hitting on Weiss and then flirted with Pyrrha, right in front of Weiss. You can't undo first impressions and Neptune had a much better one. Up until then, Jaune had messed up Weiss' plan to partner with Pyrrha, hit on her before the two had even been introduced, hit on another girl right in front of her, and worst of all he hasn't studied.

I say the last one is the worst because look at Weiss' reaction to Ruby as the leader. She isn't mad that Ruby was made leader (ok, maybe a little), but she was mostly mad because Ruby doesn't take her position seriously and goofs off. After seeing Ruby take on the role of leader and spends the nights studying, she starts to open up. Jaune has no idea who Pyrrha is, he is failing a few classes probably (going by history class), and hasn't improve at all in weeks according to Glynda. Weiss may feel that he too is undeserving of his role and as a result can't accept him as even an option; especially if she feels he is bringing Pyrrha down just by her being on his team.