Masteries can only use 1st page

Okay, i have a major problem, i can only use one of my masteries page. Everything looks like it works, but it doesnt. I change my masteries in the champ selection screen and when the game starts, it loads my first masteries page. I was playing braum and was thinking this guy is way to squish. of course i died alot and we lost.
Another person in the game at the start said "i know i switched my masteries and it didnt work". So i know im not the only one, and he is the reason i looked at mine in late game.