coupon issue

Hi, I am thinking about having my customer a privilege of 10% discount on their first purchased only. This can be limit by the email address that they use during checkout. I will ask them to subscribe to my mailing list to get the coupon. It is great for leads generation I think. So that...

Hello I've set up one coupon code especially for a customer. I set number of usage to 1, and then gave it to my client. She used the coupon which is shown in order details, but the coupon shows no usage in Marketing > Discounts and it's still alive :) Just a small issue, but may cause troubles...