Megs, I'm glad that you posted this. I have noticed this very thing on many products, lately. Hmm... Sugar-free, and yet, it contains corn syryp.
I remember when Joy was having so much trouble losing some stubborn pounds. And then one day, she saw the person filling the "unsweetened" tea container and was able to read the label it came from. It had corn syryp in the ingredients label.

She had been drinking a lot of that tea. She stopped, and was able to drop those pounds.
REMEMBER TO READ THE INGREDIENTS LABEL, PEOPLE!!!