Within the editing page, click 'Manage Coupons' on the left.
To edit a coupon, click 'Edit' beside it. To delete a coupon, click the red 'X'. To change the order of your coupons, use the arrows under 'Sort' to click and drag them up or down to where you'd like them in the list.
Make sure to save your changes by cliking the green 'Save' button at the top right or bottom of the page.
