Until yesterday, the sale price to upgrade from XWD11P to XWD365P was listed as $44.99, a $5.00 discount from the regular upgrade price of $49.99. Because it was only a $5.00 difference, I decided to wait to purchase. This morning I see that the upgrade price is now $64.99, a difference of $20. Why the sudden increase in price? Had I known that it was that big of a difference I would have bought while the sale was still valid. Seems a bit misleading to show a lower price as the "regular" price and then change it to a higher price after the sale has ended. Any thoughts?