You want to keep your dip controlled, not necessarily slow. I have (had?) an issue where I was way too fast to dip. The bar would leave my shoulders as I descended, only to crash back onto them as I drove upward. It definitely caused me to lose tension in my upper back and shifted the bar's path forward. I think you're going in the right direction, both with respect to the jerk and staying the course with your program.
When you get a chance, post a video and I/we can give you a little more insight.
Javier A. Sanjuan
Olympus Barbell Club
Dear God, please help me lift heavy and be awesome. Thanks. Amen.