As to "bizarrely drawn," plenty of animation inbetweens and poses just short of a rest look wacko if you pluck a frame out. In the flow of motion all that's important is that it feels right.
Yes, of course I know that. I made it perfectly clear that I was speaking about its selection as a representative still image. The fact that in-between frames look so weird is exactly why it's strange they'd choose one for that purpose.