I have heard that supposedly there is someone at the Sci Fi network who doesn't like Dark Shadows much.  That's why it's preempted, and buried in bad time slots so much.  Also, look at the documentary they produced (Sci fi) about the show.  It was so bad, Dan Curtis Prods., or someone, threatened to sue, if it was marketed.  And 3 stars walked out of the Festival Banquet in Anaheim last year over it being shown.  The only 'good thing' I can say about Sci Fi, is at least they've shown Dark Shadows "most" of the last 11 years, except a period which they skipped.  I, too, think that Soap Net would be a good place for the show.  Why doesn't Soap Net show reruns of any CBS soaps?  I used to love Secret Storm, Edge of Night,  and have always loved Y & R, but they never show them.