Altium "Update PCB documents", components are generated at the same place
What I normally do is to arrange the parts per section of the schematic, regardless of hierarchical structure, so what in your case would be a single input amplifier within the input connector page.

To do that, you just type T O L  or click on the tools menu, Component placement and Arrange within rectangle. Then you just draw a rectangle with the cursor of the mouse, where you want your parts to be.