I have dual joystick for my android game but when I set the position of the left joystick in the inspector as x=8.4 y=0, z=0 it is fine but when I play, It resets to 0 ,0 , 0. 
it gets shifted at wrong position. No matter what i enter as position in the transform in the inspector, it always resets to 0 when I press play.
I know this question is a little old, but I found a solution that worked for me.
I presume that you use the joystick.cs script from the standart assets. Try changing the OnEnable() function into a Start() function. It seems to be a caching problem.