Your first two pulls looked fine. Add a little bit of weight from there. 5 or ten pounds at a time. I remember seeing your first pull in the SSC Q&A. I think Coach Wolf commented on it. Listen to what he said. Perfect is the enemy of good. You dropped your hips in the last one way too much. Some useful cues for chest up and lumbar extension:
1. squeeze chest through your arms
2. show your nipples to the front wall
3. Show your ass to the back wall.