they both look pretty good from here... maybe you could try and sit back a little more, and possibly widen your stance a bit if it helps keep your knees behind your toes... they only stick out a little, and it could just be the way your frame is, hard to tell under all the sweats... if you consider yourself to have long(er proportioned) legs then it just may be the best you will get... if you feel no pain in the knees then most likely you are fine..
as you get heavier remember to push out with your knees, maybe point your toes a hair out to the sides...
seems like your chest and back and head are placed perfectly... not bad at all...
take it slow working back up, the muscles that were being neglected will need some time to catch up, but you will get there soon enough...