That's just endless buck-passing. The reality is that the kind of fuck ups that could happen, did happen, like a storyline from some cheap zombie/biothriller novel.
And only two people got infected. Yes, errors in protocol happen, and can be expected to happen, and did happen, and will happen again. And only two people got infected. That is because of exactly what the CDC has said from the outset. Ebola is hard to get. Even with the errors in protocol that we know can, do, and will happen, particularly at the beginning when some people have there guard down, Ebola does not magically leap tall buildings to infect everyone within a thousand yards.
More people in the US will get infected, and more will die. But if you want to reduce your risk of death, worrying about Ebola comes way further down the list than, for example, eating healthier, exercising, and keeping your blood pressure down by not worrying about insignificant threats like Ebola. Wash your hands, cover your mouth when you cough, and if it's wet and it isn't yours, don't touch it; but those are always good ideas. Now go on about your business and tell people to stop being panic-addled nitwits.