Not sure how I did it, but the max hardiness/wisdom was 183 (I think Might, might be too) before I would cap the level (75/75) but that wasn't enough to get more stats points. Now with the "Buy all" I think all the bonus that you get at once bypass something that make me get more xp than would "fit" in the 75/75 and so granting more stats point.
Not sure if is something that worth looking into...but