I have a Ladies Banquet that I have provided an $11 off code for (i.e. the cost of one Ladies' ticket) those that decorate a table. I want only one $11 amount to come off per transaction.

A lady added 3 ladies tickets to her order totaling $33. She entered the code to take off the $11 for one ticket and all $33 came off.

A feature is needed to state how many of the $11 discounts can be used per order. In my case, I need ONE $11 discount to be taken off. Not the entire order of ladies tickets just because they are all $11.