I am offering if the customer buys a book and then adds a book from category 200 they get that book at 50% off the cheapest book. This works great with any category combination, except for when some one purchases just 2 books from category 200 for this the coupon give 100% off one book or maybe it's 50% off each book making look like one is free. How can I correct his to only give 50% off one of the books when just two books are in the cart from the same category???
I'm running Community Edition Magento 1.9.
