Calories in 7 cups of popped popcorn?

I recently bought the big orville redenbacher 94% fat free smart pop bags and it says that 1/2 the bag (7 cups popped) is 130 calories. I looked up online and every website says that 1 cup of popped popcorn is about 30 calories! So if 30 calories multiplied by 7 cups is 210 calories, then why does the bag state that 7 cups popped popcorn is 130 calories? If anything, shouldn't it be more than 210 calories because of all the additives?