Looks like the exact same thing just happened to me. Utterly baffling as I received my order confirmation a month ago, and the charge hit my PayPal right away (and my bank account the next day). All of the sudden I'm told my order is cancelled, which... what on earth

Out of curiosity, was your initial PayPal charge for the grand total of all books & digital downloads, or just 1/3 of that? (I was charged 1/3 of the total amount -- at the time I figured that was because the PHB was arriving first.)