Its hard to tell because I'm not sure how many seconds are between each picture, but if the frames are back-to-back, try keeping your butt out of the tack a little longer. It looks like you're sitting down before he lands. Let him land before you sit and then he wont scoot out from under your tush to fast :)
I love how he pops his knees up for you! What a thoughtful jumper!
Cool horse you kida have a chair seat in the canter. Try sitting in the front of your saddle. Then while jumping rock your hips back with your leg. Your a little hunched and your hands are on his neck. On the landing in the first set I think you slammed on his back. Hold the 2pt. More if you do it to much and if he's old it could end up a lond time thing....
Sorry i'm not trying to be rude- but how can I be on his neck when my hands are on either side of it? Where am I on his neck? Also, it could seem like that because I have white gloves on him and he's light coloured?
I have a bad habit of sitting back early over a fence- tips?