if given the same chance again, the thing i would do differently is place the shot just a little farther back, so that it went diagonally through the vitals.
Hmmmm, place the shot a little further back on a quartered at you deer. Now, you will definetely only get one lung and probably liver. But, do you think that is very ethical with a bow? Although it is lethal, I would never intentially take a liver shot. I am agreeing with what others have said and would highly recommend that you get to know the deers anatomy better. If you need any good sources let me know and I can direct you to some excellent sources.