I wanted to check which items were eligible for the XIV discount before purchasing so, whilst logged out, I (naively) selected a random item that automatically added the "ultraworld" emblem. Upon removing the item you purchase, however, the cart became stuck in an infinite loop. I finally overcame this by adding another paid item (suggesting the emblem is the cause), but when I tried removing the emblem, it automatically reappears, causing another infinite loop as you can't get rid of it. It also prevents users purchasing the "Gilded Shell", because another purchase must be made first to clear the free emblem from the cart... I've only tried this on the EU Store, though I suspect this bug is present on the US Store as well. I suggest, therefore, an update be made to allow customers to "opt out" per free emblem, should they want to.