You're not reading the map incorrectly. Everyone just has to understand what the map is. It's a snapshot comparison between today and exactly two weeks ago. So, if Missouri was red hot, and not quite as hot today, then the map appears to make them look like they are doing better.
People create maps like this to make a point, frequently political, throw them out there on social media, and they make their way into places like this thread.
The Delta variant will make it's way across the country, as did the prior variations of the disease, and everyone will get their turn as a place seeing the numbers jump compared with the weeks before.
I think it would be a really interesting project, years from now, for someone to map out the movement of the virus across the country on maybe a county by county basis, through the various surges and retreats that we've seen.