I am trying to set up a coupon code that applies a discount to only a specified set of products ("a" and "b"). When I add product "a" to my cart, the discount is correctly applied. If I add product "c" to my cart (alone), no discount is applied, which is also correct. The problem occurs when I have "a" and "c" together in the cart - the discount is applied to the total of the two, and not just to "a".
This is version ML 7.0.2.5/7.0.2.5 Service Pack 1
Thanks for your help.