Your leather length is just fine, besides if you were to go any shorter, your knee's would be hitting those blocks at the pommel there....ouch. If you were in a CC, maybe - but you're not going to get much better in this saddle.
I see that you are jumping ahead though, your seat is way out of your tack and your crotch is up over the pommel of the saddle. Just work on keeping your horse infront of you - not jumping ahead. Push your seat back towards the cantle.
Your release is a tad over exaggerated, :P - you're not doing a 5'0" oxer.