no private modification on discount
SQL Server version: SQL Server 2014 enterprise edition
Scenario 1: If use one applied to categories coupon and another one applied to products coupon code when checkout the shopping cart, then both of the two coupon codes will be applied(cumulatived), but on the shopping cart page only show one discount coupon code.
After the order be placed. Go to admin area, view the discount usage then you will see only one of the two discount coupon codes be recorded the usage history, another one not updated. if you go to the order detail page to see the order info tab, look the "used discounts", there is also only one discount name.
Scenario 2: If use two discount coupon codes with the same discount type and make the "Cumulative with other discounts" checked, then only one of them could be applied.
Andrei, could have a look on these issues?