Since 402 is in HD format, just not full screen, I changed the format to Zoom so that it does. The Hopper remembers this and goes to that screen format each time I go to 402. It reverts to Normal when I access any HD channel.
If I remember, a long time ago, a person posted that he worked for US and that they broadcast the feed in HD. That would explain why 402 is in the HD screen ratio. Why Dish doen't show it full screen, I don't know.