
I don't think you've created an intelligent moster, I think your breed is naturally intelligent & independant :) I'll leave the advice to the experts here (Marianne is the one for this!).
But, this bit reminded me of problems I've encountered with Buster:-
> he has to believe everything is his own idea or that he is going to get something out of it.
This is the thing that sticks out in my mind the most (there have been others, but this took the longest to crack). I had a hard time getting Buster (different breed than you, but still incredibly independant) to go outside for the his last wee of the day. He had a set place to wee on the lawn, but would flat blankly refuse to even step on the lawn at one point, even if I tried to lure him with a bonio
(he LOVES bonios and usually will do anything for anything edible)
. He got so stubborn with it

We started to make some progress, but that was me pointing for him to go on the lawn and him deliberately walking around the pond to go in the
opposite direction to where I had pointed!!! (He knew exactly what I meant by pointing). I can't remeber how I nailed it in the end, but flippin' 'ek, it was a battle of wills and trying to come up with a way that seemed like HE had the idea to wee and I just rewarded it! (He now readily will go out for a wee when told, no more silly mind games! :) )