Yes, this is a 2 pack and yes, you save some money compared to buying 2 single sets. But these 2 sets are not packed separately, meaning the second set is no longer sealed when you use the first. No problem when you use them simultaneously, but when you want to save the second one for later (possibly to use on the same guitar), it's not so fresh anymore after some weeks. Also: the single sets come with an extra .010 (though I've never had one break, so I don't really miss it), tis one doesn't.
Apart form that, I really like these strings. Good feel, on par with more expensive sets I've used before. But I'll buy single sets.