I took
@Donald - my hero advice and looked the orders up in my Staples account. Both orders in question say "Reorder" I can see the AM # the order was attached to but no coupon code or discount of $.01. I'm guessing they didn't know what it was for and didn't bother to add it.
Donald can you post a screen shot of your order (from your staples account) where it shows the coupon so we know where to look. To me Reorder means it's messed up. See if yours order says that too. I know my Airmileshops won't work because they cancelled the first (original) order.