User blog comment:IamJakuhoRaikoben/Chapter 496: Forward, Review./@comment-4449950-20160802062620/@comment-7418318-20160802065924

Nitpick Time!

Siegrain/Jellal said that Ur would have been Wizard Saint level if she had lived. That doesn't mean she was already on that level when she died, but rather that if she had continued to grow stronger she'd have reached Wizard Saint level over the course of the years between her death and the time when Jellal made that comment.

And on top of that Jellal never personally met Ur, so he's basing that opinion solely off of what he heard from other people.