Im new to the game,im level 2 right now got second place on league in my first season and a got a question.

I logged in and looked at my team and he got strange... Like on the first season i got 3 player 5* and a lot of 4*. Now i got 3 players 4* and a lot of 3*

Something changed? Every season is that way?

Please if someone helps me would be great

Gracefully, Rafael.
Coach of Half Blood FC