Can I use more than one discount/promo code on an order?
Sorry, this isn't Kohl's.
At least not until we sell to them for $100,000,000,000.
But in all seriousness, the technology we have for the time being allows one discount code or gift card per order. If you get your hands on two discount codes or gift cards, by all means, use one now, and use the other on a later order. That's just smart spending.