I cant's really tell anything from the first set of pictures, they are too small to see anything. The second picture though, you need to shorten your stirrups about 2 holes, there is no bend in your knee. Your foot looks shoved into your stirrup and your toe is turned out to the point of it being parallel with your horse's side. This is a big problem and you need to fix your leg. Lots of no stirrup work both on the flat and over fences will fix this. Your release is fine, it doesn;t look like a large fence, you are ok there. But you don't have any bend in your upper body. Your butt needs to some down more and you need to fold at your hips. You also look too far forward in your saddle. Your crotch appears to be almost directly over the pommel of your saddle. Shortening your stirrups, developing your leg, and learning to bend at your hip will fix that.