Champion Mastery Bug

I've recently been striving for those new mastery levels 6 and 7 trying to get S on my lvl 5 champions to get the tokens i need. Now i only need one more token for lvl 6 Lucian and ive had 2 recent game where i should have gotten it in at least one. If you check my match history where you can see i went 18/0/9 on him right before i sent this and yesterday i went 18/2/12. Please tell me if i am wrong in thinking these are S worthy but im pretty sure they should be because ive gotten S for less.