So it is as i suspected.
Its possible change template of a division just deployed working division by division on their own templates, not on the general template in the division designer.
This one change only the template of divisions not yet deployed.
No, if you change the template in the division designer, it will start changing all of the divisions you have of that type as well as any you build in the future. You can't change the composition of an individual division unless you set up a new template and allocate the division to that type.