For SJ, I would say that for that height of jump you could lengthen your stirrups maybe two or three holes (it depends on how close together your stirrup holes are) so that it is easier for you to get in the correct position. Also your legs will be able to get more under you. For XC, I'm no expert but you could probably go down a BIT. But I'm not really sure.
They are way short.
Does that not hurt your ankle? Lol
For SJ your anlke is just bent awkwardly making you leg swing back and making it hard to get you heals down right.
Your postion looks great though and will look even better once you get your leg stretched out.
XC, I would let it down a hole I think... not as bad as SJ, but the bend in your ankle still isn't quite right.