Each graphical line (or circle or,…) has a property called “common to all units in component”.
Deselect this by pressing e above the line to open the line properties.
Also make sure that in the symbol properties you select “all units are not interchangeable”.
more information on multi unit parts (This “tutorial” describes how to edit a multi unit part where all units are interchangeable into a part where not all units are equal. But i think at least some of the information provided there might be helpful for you.)