I got this thing about a month ago but have never carried it due to one thing. How do you "set" the mode? or can you? no matter what I do it switches modes with every press of the button. A soft press should do this, but when I turn the light off (from the low setting), I dont want it to be set to strobe when I turn it back on. It always advances. Anyone else have this problem? Is it normal? I cant stand it