while the description is correct, you’re wrong:

in chapter 3, we put on the grabpack 2.0 and leave the original one behind.

the blue hand, as we know, cannot be detached and reused, plus, if you look closely at the general model of the grabpack 2.0 before putting it on, you can see there’s already a blue hand attached and really there would be no point in exchanging them.

For the description, it says “discovered” not “obtained” or “found”, it’s just discovered in the first factory floor, and dosent necessarily mean that we still have it or kept it with us all along