Position Variant issue

Hello Community, I have started to learn the Product Perception Exp role and sounds amazing.

I am in a self training using a motorbike as a sample; I want to simulate a movement like the tank and labels assembly by  positioning the different objects along a path but I am stuck at a very basic task.

I have created a variant with all components in their original position but when creating a second variant by moving some of them, they keep the new position even coming back to the original one.

moved components in Position2 

In Position1 the tank should go back in the original position but this is not happening

I guess I am missing a small but fundamental option...

Thank you for any assistance.