Just a shot in the dark here but could the toffee be two genes in play ? Albino and Toffee so they are infact Double Hets, Would explain why it's compatable with the Albino. Just like the leopards at the moment people think they are all het pied and come from the pied gene.

Or it could just be that his het toffee is het albino, I wouldn't be saying anything until more test breedings been done. But would be strange if these albinos turn out to be toffees and all you need is a het toffee and an albino to produce them