Yeah, channels available in a higher tier that are not available in a lower tier. That makes sense, that's why the higher tier costs more. But other than Fightbox, I don't see channels listed in lower tiers that are not available in higher tiers. And I don't see BBCnews or MTVsuite listed in that link.
For what its worth, I was looking here:
DISH Channel Lineup - See Channels by DISH Package | DISH
And that page doesn't even show the AEP package. I'm not trying to start an argument, my only point is that to me the only reason to have tiered packages is to offer additional channels as you move up. Removing channels makes no sense to me.