Mastery Selection Issues

Anyone else having a problem with their masteries? I have a mastery page for my Zilean Support, I had it selected for the match, but for some reason it gave me my Corki mastery page. Next game I made sure I had the right one selected and when it went to hit "edit" on my Zilean page during champ select it took me to my Corki page. It seems if I dont specifically select the right mastery page each match (even if I play the same champ twice in a row) my masteries will revert to my Corki page. Anyone else had this happen?