Hi,
I wouldn't be too worried about the sugar in the Sweet Mild Barbecue pork rinds as it should be counted in the total carbohydrates which is still less than 1g per serving (same for all flavors). My understanding of the low carb way of life is that you don't need to completly cut out sugar but should limit it to very small amounts. That means that you can eat things like sauces, dressings, snacks, etc. PROVIDED you take into account the total carbohydrate amount. Maybe someone will jump in and tell us if I'm wrong.
I also noticed that the Hot Barbecue pork rinds don't have any sugar.
Simon.