So I have EC seats on 2 out of 3 KLM flights and have been checking regularly for an open EC on the third flight. Checked today only to discover that KLM has locked down my seats and won't let me change even though it's more than 72 hours before my first flight. I understand the 48 hour airport control thing, but 72 hours+?? I'm now with OP, KLM must hate me.