So I have added some things to my shopping cart and when I go to place order it just takes me back to the beginning of the shopping cart order placement. I have tried logging out and back in, same thing. I then decided to remove the pdf document and leave the rest of the physical books and same result. Is there anything I can do to get this order placed? Also, my last order is still showing as pending, I assume this is because I have preordered items in that order that haven't shipped yet.