Often eyes do not correct exactly the same no matter what method you use. That is what happened here. There was no reason not to edit twice (but I didn't try)...just doing something different out of boredom.
If you want to lighten the brown you could duplicate the layer in screen mode, add a black mask and paint it back in with a white brush...adjust the layer opacity.
I used Hue/Saturation to turn the white to yellow before running the action (as done in the Horse edit on dpreview). You could use Selective Color too.