Most of the time, you hit a volume button on your iPhone, iPod touch, or iPad, and it does what you expect, whether it's turning up your reminder alarms or turning down your music. And then there are the other times.Related StoriesMid-week iPad 5 rumour round-upApple is 'not operating a monopoly' with the App StoreiPad, iPhone demand weakening, but two new iPad mini models could launch this year, says anal