I ride western, and I know nothing about jumping as a sport. But I also think your sitting a bit forward (even though you make it look beautiful- and I love the smile!). I can't help tho. For some reason when I think of jumping my horse (and all we've done is ditches....) I can't put into words what my body is doing. I don't know if it would be helpful to you either. I think I do lean forward, but my butt is still center of saddle. Hard to explain, and I am not a professional, but I'm just trying to help.... If you reposted this in a new thread, I would like to see the answers. You both are beautiful, and photogenic, lol!
Angels are people who can see and feel the pain in all creatures... -myself