Nature and ability are determined at a completely separate time than IVs. So once the old man holds the egg save. The ability and nature is already set, but the IVs are not. Go hatch it. Does it have the nature/abilty? If so reset, then RNG the IVs. If not, then try again with the next egg.
Egg IVs are right. Assuming that's Emerald breeding non-split. Split/alternate are uncommon and should not be aimed for.