So many things that happen on Dark Shadows don't make sense but I guess that adds to the charm of the show. Collinwood had so many supernatural beings over the years yet every time a new one would pop up the first person to see it was told by the rest, Thats imposible you must have imagined it.
One other caveat, they did end on a major cliffhanger which I suspect, other than fan fiction, WILL never be resolved, as the cast and crew is very unlikely to be reassembled.
[Reunion also did this, ended in the middle of the year and we didn't get about 1/2 the eps so we'll never know who killed Samantha or why.
Yes, just when you think TV can't get any more banal and stupid than it already is, they come up with something even lower on the food chain......