By "the big bit" you mean the one with the knee, correct?
I think that's the longer stronger, but it's a bit shallower too.
The two halves of the stringers on the C19 are the same dimensions... there's no step on the bottom as far as I can see, probably because it's simpler and the hull is large enough to not need it.
My gut says the stringers with the knee should be the inboards, because they're slightly longer. The outboard ones would be limited in length by the curve of the bow. But you're right, they're the other way. I reference this pic.. is this your boat?
http://www.outbackpics.com/Boat/pages/jig/jig4.htm
So, problem solved, I think I'll get it right, assuming I can cut the slots correctly.
I still don't understand the text correction from the website I referenced in the first post, though
Erik