Trick or Treat at Dell?

I was shopping Dell last night and saved my shopping cart since my wallet wasn't handy. Before saving the cart I had entered a coupon code for $20 off. My total was as I expected. I then clicked save.

When I returned this morning to retrieve my saved cart, the item was there but the coupon was gone. Mind you, this coupon doesn't expire for a week so it's not like it expired and they removed it. I have to suspect that this is a standard practice over at Dell. I'm sure lots of people forget to re-enter the coupon code and end up paying full price. What a scam!