I don't know how painful a decision this was for this woman, and I'm not going to point any fingers. But she should've definitely done more to confirm the positive amnio pop. I certainly hope she did and simply didn't make that part of the story.
That really is not true. Amnio tests are 100% accurate, as long as they don't mix up the patents lab results.
By the way, that is exactly what they did with a friend of mine.