Evolution of Tsahaylu

[Dyfrnt]

New to the forums, but not a noob on Avatar or Pandora. But just came up with a question that I'd like to hear some opinions on, or maybe from the headz that write the Avatar-Wiki.
So when the Tsahaylu was evolving, or for everyday (non-movie script) life on Pandora, when a bond is made, Why is it that its the NaVi that have control of the fauna? I mean, why dont the Ikran mentally tell the Navi -"ok, instead of hunting, you're gonna bring me to those yummy fruity things to eat" or When Jake bonded with Toruk, Toruk's like -"dam, I was gonna eat you the other day & you got away, no, your not gonna ride me. get outta here". the point is it seems like the Tsahaylu is only single directional in instructions/demands rather than a two way street. What makes the NaVi more powerful/demanding over the other animals?. Anyone get what I mean?

On another note, When Jake & Neytiri bond, Why cant she see what Jake's real orders are from Parker & Quaritch as well as what is to become of Hometree?