New quote from an IGN article:
What's that supposed to mean? Unless they meant that you can now go from being a werewolf to being a vampire without having to go through the vanilla cure quest, this contradicts previous confirmations.
I'd guess they meant what you've said - at least one of the previews mentioned that werewolves can get cured for the duration of the DLC (to become vampire lords) and then go back to lycanthropy. But not both at once.
Also, some parts of that text sound weird:
The good of being a Vampire:
Increased health, Magicka, Stamina by 50%
Turn into a vampire anywhere in Skyrim
I really doubt becoming a vampire will be that good
