Hairdresser took 2 inches off again!?

i bet they're just cutting off the dead/split ends. If you're really unhappy about how they're doing it just tell them. Next time you go in be like look i know you took of a lot last time but i really dont want my hair 2 inches shorter, just trim a half inch. Just let them know and they will be willing to please you cuz they dont want to lose a customer.