I appreciate your response, so I know that when the rating is over the threshold whether you don't upgrade the league the +10 is not guaranteed, but I don't understand why my ladder is still the diamond one and not the gold one since the rating obtained at each battle won is +3 and not at least +10, I think that if my ladder is diamond one also the rating should be referred at the diamond league. Moreover, I got 40 chests (diamond III) and not 30 chests (gold I) at the end of the season. It is odd!