Let me know if I'm wrong about this one.

I've seen ads for "66% double hets", which I assume must have come from a pair of 100% double hets.

Shouldn't they really be 43.5% double hets?

Lets say that you breed a 100% double het lavender pied to another 100% double het. The odds that any normal-looking baby inherits the lavender gene at all is 66%. The odds that any normal-looking baby inherits the pied gene is also 66%. So the odds that they inherit both of them is less likely than just one or the other.

In statistics the odds that any two events occur together/after one another is found by multiplying the odds of each together. (.66)(.66) = .435

Right? I know it's not much of a difference, but still.