I hope you take this in no offence at all, and I have not been wanting to reply to this thread because of what im about to say, but I don't feel as though Kiara's picture is a very good example. I say you go look at some pictures of MIEventer or Roro's pictures, and you will see the correct position. Both of them have been taking many lessons and know what to look for in a rider. Maybe you could try asking them to help you out a bit.
I do not want to be attacked for what I have said, I just feel like it was something that needed to be said.
You can never take a Thoroughbred away from a horse crazy girl.