Electronic – Altium update from schematic – delete and add component constantly

This is the kind of thing I experience whenever my zero-registration in the component footprint is off by a lot. It looks like your components have a large difference from the Y-zero-point to the actual pad.

Try opening the footprint editor, press E for Edit, F for Set Reference, and choose Pin 1, Center or Location.

Pin 1 sets the origin in the center of your Pin 1 (obviously), Center sets the origin in the center of your component horizontally and vertically and Location lets you select an origin at any point on your grid.

Edit: Oh, and after doing this, delete the components from your layout and do another "Update PCB Document" to reimport the components to good default locations.

I have managed to find a solution. In case anyone has the same problem, here is how I fixed it:

In the PCB file, click Design->Netlist->Clear all nets... then import changes from schematic. It should now work.