Yeah. I'm no business genius, but I gotta think that having cars that actually exist would really up your sales numbers.
I think the SS is built on the same line as the Commodore, but not at the same time. They did an initial run of their domestic version, and then were supposed to switch over for the initial SS run, which I believe was to be in September.
The Commodore is hugely important for Holden, where the SS is a novelty item with a non existent sales model. Maybe Commodores are so hot they don't want to slow down production to switch over to the SS for a full run quite yet. So they knocked off a hundred or so to save face and buy time. Which is why a dealer can tell you how many he's getting, but has no idea on color or options, and why nobody is really taking orders.