Mine went up as well. I just started playing this game recently, I'm level 3 (but missed almost all of season 1, there were like 4 games left when I started).

My national team opponents were something like 45%, 65%, and 77%. My national team rating climbed above 75% from training this week and now my opponents are 70%, 95%, 105%.

It's not very immersive. I had been playing "hard" opponents like England, Germany, France who were 77%, but now Iran is my "hard" opponent and they are 105%?? Really?? lol