Deji Deji Nikki mini book and Calendar 2011 can't be bought from the TA Shop at the moment, because they forgot to put a separate link for us. We always need our own link, otherwise that will happen, they won't let us complete the order and that text appears...
I've been trying to tweet to Kome that we need a link, but he hasn't notices yet...
But there's nothing wrong with your credit cards, don't worry. It's about using tenso.