Does it Really Add Balance?

I have checked the Balance stat every single time I rank Sword Mastery, but I don't see the Balance move at all. I have checked this with several characters ranking it from Rank F and forward.

Does it secretly increase Balance as a hidden buff, much like Shields does, or did I miss something?

It should add balance...

It does. It says so right there in the description...

Found the problem.

The Balance is only added after a relog.

Or at that the numbers only updates afetr a relog.