Hi Mahekaru,
I don't know if this is a solution but... If you are currently using coordinates, perhaps you can add and subtract values from your X and Y coordinates for each time you want to click.
I.E. Say you have a square of size (100,100). But everytime you click on the center point (50,50), the program thinks you are clicking on the top left of the square (0,0). At that point, you could add (50,50) to all testing coordinates after recording the test.
Good luck!
-Sean