If I get the bundle which comes with both (A realm reborn and HEAVENSWARD). Now my question is will it come with 30 days or 60 days (30 days for A realm reborn and another 30 days when HEAVENSWARD comes out)?

What if I buy them separately (buying HEAVENSWARD when it comes out)? will I get 30 days for a realm reborn and get another 30 days when I buy HEAVENSWARD?