If you look closely at that list..the channels NOT in HD do not have HD next to them n(i.e TNT-HD and conversely Dis-E)
I can see a little HD next to the logo for Dis-E. I think the lack of an HD on some of the logos in the HD column is just because they do not have a specific logo for that channel with HD on it. The intent of the listing is to show an HD column for those channels that they are showing in HD.