You have put all 4 movements in a timeline. If you want only the instances you click to move, you have to create a second timeline on the right, under timeline 1 there must be timeline 2 with the movements of only the instance that you want to move on click, and then you have to give a numeric variable to the sprite, and assign different numbers to the instances.
The third line of code is enough to activate the timeline. On click if variable 2 -> play timeline 2
if variable 1 -> play timeline 1