Changing Prices on Clearance website.

I was trying to order a few items from DG2 clearance. On the full listing of items was one price (i.e.$13.47), but when clicked on to order by size, the price was about 20% higher. Why the two prices. T decided not to order 3 items because of the pricing discrepancies. I also saw this on at least one Antthony item and a few others. HSN–what gives???