When Motion Tween created object auto moves few pixels from its original position?

When Motion Tween created object auto moves few pixels from its position, copying from last frame same object sometimes doesnt paste into its postition, even changing X or Y coordinates it jumps back to wrong postition. 

Sometimes re-copying object from last frame helps with tiny position inacurracy, but there are times when you need to rethink whole animation, becouse nothing helps and it doesnt stay still even without animating anything.

Anyone encountered this issue?