I see what you mean - the cantle does seem to sit very high, and the pommel low. Try putting a riser pad, or else just a folded piece of cloth under the front of the saddle to lift it, that might make it sit better. *Not a professional saddler*, but I have had to do that with downhill highland ponies before to lift the front of the saddle. That saddle definitely looks like it's going to be pushing your weight forward and out of balance - maybe try a medium-wide gullet just to see whether it sits better. Also, if you loosen your crupper one hole it might sit in a better place.