i would like to see you looking up a little more.
i cant really tell, but from the looks of the pics, your leg has slid back a little, and you are kind of resting on his neck.
this is very common in the hunter world today.
i love your horse. (GO STOCK HORSES THAT JUMP!!)
it looks like hes leaning a little to the left, but that may have been how you approached the jump. he uses his neck//back well it looks like.