Here's a helpful guide to how these things happen from a former CIA analyst. It seems clear to me that the intelligence was bad and/or confusing, and the administration caught flat-footed. There obviously should have been more security at the consulate; and that fault lies with the administration. But I really see no solid evidence of any deliberate lying about this, which would indeed be a scandal.
Romney will attack on this tonight. I'll be interested in Obama's response.