This is big problem of this game. If you dont have something 100% fixed you can´t proceed the challange.
Its good idea but its not working i scored already in league most goals like 10-15 more than 2nd and 3rd team but i don´t have any playeer in top 5 assist but have 3 players in top 5 scorers. You should consider for the future to fix this problem as i scored in some matches 5-7 goals and have only 2 asssists as everyone is challanging here.