more than 5 seconds? I switched it to one min, two min, ten, etc but as soon as I pause for literally 5 seconds, the phone goes black and I gotta unlock it again. VERY annoying. If i want the lock/dark screen on, I'll put it on to engage when I want it to. I wanted 10 minutes; not 5 seconds . There's not even a 5 second OPTION. any one know how to fix this?