I have a coupon to give a $129 discount if a certain product is chosen(a pump). If I have 2 products in the store including the pump it gives a discount of $64.50. If there is 3 products in the store it only gives a discount $43. It's not giving a discount for all three items it's only giving a discount of $43 total. When it should be $129.
You can have a look at http://redpaddleco.com.au you have to buy the pump to get the discount and the coupon code is Mat01