Orders from Holland double taxed?

Hello,

When I make an order (I'm in Holland) and hover over a produkt I see "catalog price incl. tax" (in Dutch). But when I make the order another line with tax is added!. In other words, I'm charged tax two times! I'm sure that must be wrong as in the past I only payed tax once. Can you explain?

Kind regards,

Erik van Dongen