[2D] - Moving the child moves the parent <-- Unwanted behavior

Hello everyone,

I'm in trouble for some reason I need to offset a sprite from its gameobject. The most easy and popular way to do it is by creating a parent GO that holds the child sprite and then offset the sprite via its transform. I mean it's easy buuuuuut ... it doesn't work for me, the parent moves with the child and so the sprite doesn't offset. I tried everything to see if I'm missing something but no.

I made a video at that link to show you how I'm doing it : https://youtu.be/BCEl322e9F4

Thank you for reading, pls send help :'(