Okay, I'm preordering the Warpath wave. So I go to Generations 2011 Series 04 - Set of 3 - Transformers 2010 - 2011 Transformers Generations - Deluxe and I add it to my cart. Then I log out. But when I come back later, it's not there anymore, and it says I have no items on order. How can I get it to stay?