Bunch of extra states with similar shapes to existing states, so it messes with your eye and kinda blends in.
Might be harder to do with a map of Africa, Asia, Europe or south America because there aren't as many straight line borders and things are a bit more curvy.
I see what you mean about this map being anomalous. Some of the states seem to be doubled, I wondered where they got that 64 states figure from!! My bad!