Hmm, I can't see anything obvious there for seed number sorting in [Demonoid] or [Options] or in Demonoid.ini, though I notice the Demonoid Script is using external=1, which means externally tracked torrents, I've changed that to external=0 for Demonoid tracked ones, and it's picking up the results I was expecting. (external=2 for both)
And I've just learned something.
Cheers, Mark