Hello,
still have problem. When you go to the product page which is not at stock prntscr.com/el084r, prntscr.com/el08fe, the child product which out of the stock doesn't in the selection option. When this is in the product without the child prntscr.com/el08qm, then this is normal. But when with the children, there is confusion, because the child product which not at stock is hiden at the the selection option http://www.awesomescreenshot.com/0bb65yjk73.
Hope for help