Each brand is trying to find a way to get a leg up on the competition in a tight market space. The above picture is what I found on my last grocery run. What caught my eye was the asterisk next to the non-GMO popcorn claim. My guess was the ingredients list would include soybean, canola, or corn oil.
The temperature for broiling in an oven is 260 degrees Celsius or  500 degrees Fahrenheit. Medium heat is about 177 degrees Celsius or  350 degrees Fahrenheit.
Range - Hi and Lo Broil. The Broil Hi-Lo pad gives you the capability of reducing the oven temperature during the broil function. It is featured on most electronic model ovens. Hi Broil: Functions at 550 degrees Fahrenheit. It gives a quicker broiling to sear in natural food juices. Lo Broil: Functions at 450 degrees Fahrenheit. It gives a slower broiling to ensure doneness without drying out the food. Broil: Some ovens have Broil only, which functions at 550 degrees Fahrenheit. Note: On gas models, the gas flame height is the same for Hi and Lo Broil. The flame will cycle off more often when set to Lo Broil.