Packaged components are not parametrically positioned in the assembly. That is, changes made to neighboring parts do not drive their location. This makes packaging useful when you are experimenting with different configurations in your assembly. However, once you know where components go, you should finalize their position.

Select Assemble > Package > Finalize, and then select the packaged component. The Component Placement tab opens. Configure the placement definition.

After you finalize a packaged component, you can no longer move it with the PACKAGE > Move functionality. Its placement can, however, be modified or redefined using the Component Placement tab.