So that is how I see it, I don't think the end of 1840 is inconsistent if we consider the entire picture...
[spoiler]The real "inconsistencies" of 1840 are far more obvious than those mentioned. The refusal of Barney to get back into the box... death of Angeligue... removal of curse in 1840 thus cancelling out BC's very introduction into DS and Collinwood in the first place....[/spoiler]
I would agree with that had it not been for one little thing... Barnabas hated Angelique... [spoiler]He hated her for almost 200 years, but one little good deed out of Angelique in 1840 was suddenly going to erase all of what she had done. I just don't see that. I see him telling her exactly what she wants to hear. So hopefully he want be seeing her again. The fact she died as a human in 1840. Doesn't change the fact that in other time bands she still exists as a witch. So perhaps she knew that her good deed in 1840 would benefit her at some point in a future time. Angelique never did a good deed that didn't benefit her.[/spoiler] Had the show not been canceled. I see Angelique returning as her old evil self. The writer's would have found away around 1840 one way or another.