I've written many, many times about Kittie's jumping issues, and posted links to early take off syndrome articles. Here are some photos that very clearly show what the problem looks like.
Starting here, just hit next to see the progression;
Notice her take off point, notice how close she lands to the jump. It should be spaced evenly, with the jump itself at the center. See how much higher she jumps than she needs to.
We've done it all in terms of training and re-training again and again. This is just Kittie, I can handle to compensate for these issues to a point, but she will always drop bars.