S- AND S grades not giving tokens?

I juts finished up a match in the Twisted Treeline in Hexakill Mode with Taliyah. Two days ago, I also was playing her on Hexakill and got an S-, and today I got an S. On neither of these times did I get my mastery 6 tokens. This is really bugging me, since I've been losing my mind trying to play her well enough to earn my S grades. This has to be some kind of glitch or lag in my client, or else I'm going to lose it even more than I already have (if that's mentally or physically possible anyway.)