Your pull positions aren't too bad. To second what Keith posted, you have to accelerate past the knees. You have to keep moving through that 2nd pull and really put some gas on it.
For the jerk, you have to work on getting that split consistent. I would suggest working on some split push presses and some behind the neck jerks and work on getting that weight balanced between the feet.
For the arm position, it is not ideal to have the elbows high and the bar on your fingertips. I would prefer a vertical forearm, the bar deep in the palm and supported by the shoulders, and the elbows down and out. This puts you in the best position to push straight up on the bar. It should be the same position you use for your push presses. If you have problems with this position I would suggest stretching the shoulders and lats and possibly adjusting your hand width to see if that works better for you. If you don't work on this I will have to start typing in all caps!