I checked your link. There is a very obvious (i) information button on top of the list for your plan. You did not read it. There are also other places to get full information on top of the list.
Maybe your title should have read "oops Bad reading." Make sure you cancel, or change the plan, in less than 30 days.
Hi zzz00 -- MNtundraRET has provided correct information about this. There is an informational button located above the channel lineups that explains that HD has an additional charge. The channel lineup link does not offer false advertising. It shows you what channels you'd receive by subscribing to that lineup and also subscribing to HD.
Per that information button:
zzz00 -- Thank you for providing your feedback about how the channel lineup is listed. I will pass this idea to our web development team for consideration.