How is it possible


I looked at my recent opponent. He had over 2800 trophies and was battling in the Badlands. A bit unfair because I had under 2300 points. But that is not the thing. I get used to the unfairness of the game. But when someone is over 2500 trophies, he reaches another arena. So I looked at the others and the last 5 were over 2500. Why are they still fighting in the badlands?