When you create a discount with a list of codes, that actually spins off a series of identical discounts, one for each code in your list. Each discount must have a unique Discount Name, as that's how we distinguish one discount from another. Therefore, for each single-code discount we spin off from your original list, we append a random string (such as 'lezcey') to the original Discount Name you'd entered, to ensure that each code's discount has a unique Name.
