I had the same thing happen a while back. If I remember correctly, it's just a dialogue flag that doesn't check the actual outcome of your earlier battle, so she can mention a previous "win" even if you beat her.
As far as I know, it doesn't affect anything else—story progression, later battles, and rewards all work normally. Since this thread is pretty old and I never saw a follow-up fix mentioned, I'd just chalk it up to a minor scripting oversight rather than a save issue.