I wonder if there was a method to SciFi's madness...
There are 1225 episodes of Dark Shadows, an odd number. Showing two each per day dictates that when the run of the show ends, on the last day there would only be one episode left unaired.
Maybe SciFi doubled up on 1087 so that this won't happen, and even on the last day they'll be able to air two eps. :-