I think the holes in the story are kind of the point of the third book. In the first two books Katniss is the center of the story. In the third book, still told from her perspective, she is important, but there is no longer a central character of the events that are occurring in the world. In other words the third book is to a large degree about the disorientation that she is constantly bombarded with. I.e., the fog of war as no one really fully understands what is happening during war.
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Bill