They sure do. My 17 packs of double and quadruple rares and 2 Suicunes with different holo patterns from Secret Wonders will back me up on that. But they gave me free sleeves to make up for it! >___>
Also I figured what box breaking is, pretty you try to read the patterns of the packs, find the reset and make an accurate guess on where your EX might be. So when buying boxes watch those seals. Your sealed box could be tampered and you won't get any EXs! But Boundaries Crossed boxes look like they don't have any resets anymore making the packs in a linear order of Black Kyurem, White Kyurem, Landorus and Keldeo so with no pattern it makes them all random. But they could still be weighed by people, which they need to fool proof... Would it hurt to put in an extra rare or two reverse foils? That way people will have a hard telling the difference and you won't feel as bad with pulls. Nah you still will but hey they're harder to weigh!
Also I figured what box breaking is, pretty you try to read the patterns of the packs, find the reset and make an accurate guess on where your EX might be. So when buying boxes watch those seals. Your sealed box could be tampered and you won't get any EXs! But Boundaries Crossed boxes look like they don't have any resets anymore making the packs in a linear order of Black Kyurem, White Kyurem, Landorus and Keldeo so with no pattern it makes them all random. But they could still be weighed by people, which they need to fool proof... Would it hurt to put in an extra rare or two reverse foils? That way people will have a hard telling the difference and you won't feel as bad with pulls. Nah you still will but hey they're harder to weigh!