Why does Steam raise the base price of a game in the middle of a sale?
So, during the 2k games sale yesterday I added Bioshock Infinite to my cart at $13.59, which was 66% off at the time. I didn't purchase it right away, and when I came back a few hours later the base price of the game had been changed to the current $69, which raised the price to about $23. Now of course that sale is ended, but the item is still in my cart telling me the price has changed from $13.59 to $46.89 (which is the current 33% off price). So what I want to know is, why did the base price of the game suddenly go up in the middle of the sale?