MF Mastery token

So this season I got an S while on level 4 mastery on Miss Fortune and then a second S while finishing level 5. When I got my S on level 5 , I got a token. Today I got an S+ but got a masterwork chest and no token. So all in all, from two S+ I got 1 token. It says that when you get an S- rank or higher you get the token. So how does it work then the mastery system? Shoudn't have I received another token today?
Report as:
Offensive Spam Harassment Incorrect Board