[spoiler]Also it looks like they didn't have a back story for Barnabas then. Saying Jerimiah and Josette lived in the house. Not that he was in love with Josette.[/spoiler]
so with this one change in the direction of the storyline the entire nature of this character goes from being inquisitive and a sharp judge of character to almost pathalogically naive.
it's not inconceivable that vicki was meant to get wise to him at some point just as she had during the previous(laura collins)storyline.