Actually, I thought the curse was that[spoiler]...anyone who loved HIM would die, which, when you think about it, would have included Angelique herself.[/spoiler]
Plus there were those who loved Barnabas - his parents, JULIA, etc., who didn't die.
Maybe all the curses that were thrown about kind of ricocheted off each other. Wasn't there ANOTHER curse back in like 1680 or something with Brutus, Miranda and Judah Zachary? Refresh my memory, been a loooong time since I've seen those episodes.