gamma problem from GUI

gamma preset for map ac_arctic set to 200
gamma preset for map ac_arctic set to 200
Hosta: It still feels gamma 100
Hosta: and it reseted me the value to 100 in the settings graphic interface wtf? :)
gamma = 100
gamma preset for map ac_arctic set to 100
gamma preset for map ac_arctic set to 200
gamma preset for map ac_arctic set to 200