This practice confused the hell out of me last year when the free preview of Weather Nation lasted months longer than it was originally listed for. When the preview (which by that point was no longer listed as a free preview) ended and I lost Weather Nation, I could have sworn that it had previously been listed as part of Welcome Pack, but it was no longer listed there when I went back to check. It is especially confusing because sometimes some of the previews are not listed on the free preview page on the Dish website, or on channel 103 SD. If Dish is going to do this, they should at least make sure that every preview is listed in both of those places at all times.That is deceiving the way Dish is listing this on their website and in the channel listings.
No, if you look closer (https://www.mydish.com/upgrades/english-packages/smart-pack or https://www.mydish.com/upgrades/english-packages/welcome-pack), Dish has decided to dynamically include whatever channels are in free preview mode at the time that someone looks at those pages. At least they didn't put
Channels in Free Preview can be found here and are included in the channel listing below
in fine print. The average person likely won't pay much attention to that but will see channels listed in the grid and (rightfully) presume those channels are included (all the time).