Checkers false discount specials

<p>This is now the second time I'm told by a cashier that I'm interpreting the special from Checkers incorrectly. The special as advertised is for 500g Future Life and 1lt Long life milk. At till point it did not give me the discount. However, the add don't specify full cream milk or low fat. I took a fat free milk, with a future life breakfast cereal. What is it that I don't understand? Please specify then in detail what is on special and what not.</p>