0.0.0
First one means unsexed.
Second means male.
Third means female.
Like you said, when you have 1.1 it means 1 male, 1 female. in case you're not clear on that one, the first one means male, second means female. (only when there are only two present.)
For example, I have 1.1 ball python normals, 1.0 pastel ball pythons.
I've got 2.0.0 comet goldfish (two unsexed)
Hope I helped

I read it in the 'Herp Lingo' sticky thread when I first got here, so glad I figured it out early!