First, the auto sensors will only turn on the wipers if the wipers are set to one of the on settings. If you turn it all the back to off, the problem will be solved. Then when you turn on the wipers, the auto setting will adjust the speed and frequency as needed. It does a decent job of that.
Second, the turning on randomly is something that can happen to any auto wipers. They use an optical sensor behind the mirror that detects the light refraction to determine if there is water. The problem is that sometimes dirt or even a glare from the sun can trigger it. It usually will run the wipers for one or two cycles before adjusting and shutting off. Ford's sensors appear to be more sensitive to glare that some of the others I've seen.