i don't think it's an error at this point. & it shouldn't be counted as that, because i think even the writers & "Dan Curtis" said they lost track on what the hell all went on during the show's run & lost track of what they did in the past. i don't mean storywise i mean stuff like saying
who Liz's Great Great Grand Father was. please put a spoiler on this part, i'd do it but i'm about to head off to bed to be honest & i'm just to tired to do that., anyways during the era i'm on NOW. [spoiler]"Barnabas" tells the story of "Josette"
to "Julia" & says that "Jossette" was married to "Jerimiah" which did later on happen. but the version he said changed not to long after they went back in time.[/spoiler] my point is i just get a kick out of that.
my other point is really this, when writing that episode my guess was that how it was going to be. but they changed it. to me it feels like since i'm sure they talked about what to add to the show.
like all shows do, you'd think they would have paid more attention to what as said by this or that character at least only a month or so before. but to be fair. if you look at any tv show from any era
they make those mistakes as well. anyone ever notice that?