Okay, I now see that the 50% reduction in price was shown on the VENDOR'S page but not specifically referenced when a customer pays, and I think that's where all the confusion is coming from. If you happen to miss the "50% OFF" on the vendor's page, you expect to see your total, MINUS 50% of what your total bill comes to, at Checkout. I've now paid the bill but wan't very happy doing so. :o/