From what I can make out, they've split this series - 7 eps now and the rest in the autumn - rather than air all 13 at once.

Getting spoiled is a way of life for me too - it usually takes a few weeks before most US shows air in Ireland; though there are some like Glee that air the next day. But I'm usually spoiled for stuff on Twitter, which is fair enough - if it's something I absolutely must watch spoiler-free, I take an Internet break till I've seen it!