So I got MOST of the touch screen weirdness resolved (phone opened apps by itself, changed homescreens by itself,etc.) by uninstalling the apps from when the problems started. And uninstalled LG's weather app, but noticed a "dead" spot all the way across the screen about halfway down, by going to settings, accessibilty,and turn on universal touch. Also "knock" only works to turn the phone OFF. I hope these issues will be resolved with Android L, but I'll keep e-mailing LG to find a solution.