Wow that was rude!

Sometimes when shopping in a store you may find a item that has been priced incorrectly or the sale sign is incorrect.  At a brick and mortar store they usually let you have it for the displayed price.  Kind of a loss leader for good customers.  Well I had an odd experience recently at the Dell website.   I follow dealnews.com and dealuniversity.com daily to find tech bargains.  Recently I spotted an item that I wanted to pickup. It was a Hitachi SimpleDrive II 1TB External Hard Drive, $69.00 Shipped Free.  That's $50 off. Excellent price right?  Well I clicked the link and dropped the item in my cart.  Then I went to checkout.  I saw Dell had a input field for a coupon code.  So I put my checkout on hold and went to find some sort of coupon code that would make my price point even better.  After a bit I found the only coupon would bump my shipping from 7 days to 3-5 days for the same price.  So back to the checkout. I enter the code and my cart changes.  Now my total is more than double what it was...  What happened?  Looking closer I figured it out.  They had invalidated the item I originally put in the cart (without removing it) and added the same item with a different item number.  To me this would be the bricks and mortar equivalent of the stock boy running to the front and yanking the item out of my hands.  Once I have it in my cart I think you really should honor the price.