That doesn't sound right. Your level is way below the minimum line and needs to be topped up. You may have air in the cooling system (engine/ heater/radiator etc) given how low it's dropped.He said if I had a coolant loss that I should have drivability problems or check engine light and that they add a cup or so coolant in all new escapes every now and then because of evaporation.
You can also have slow coolant leaks into the cylinder with no obvious signs- apart from the coolant level changing. I've had it happen with a different vehicle brand.