My object is at 0 but when I turn it 180 degrees it moves a little to the right, and I already have the option of center.
The object I did in MagicaVoxel.
Sorry for my English I’m using google translator.
That meens your Origin or Center fo the Object is not directly in the middle of the Mesh. You should check it again in your 3D Software. Maybe use a mirroring option to be sure. I only know blender, so I can not help you in MagicaVoxel.