I agree, your jumping ahead is causing you to really lose your balance. Does your saddle fit you well ?
I would practice on the flat at w/t/c and over poles at w/t/c getting up into two point and moving your hands forward up the crest. This will make it muscle memory for you and easier when you get back to jumps. After you are solid over poles, start with one single cross rail and do it over and over until it feels right.
Gypsy & Scout <3Everybody is a genius. But if you judge a fish by its ability to climb a tree it will live its whole life believing that it is stupid. ~Albert Einstein