Hi Mike,
When you search the location on the map, you should use mouse to click on the Map icon (on Google map) and drag it. After that, the system will update the coordinates into 2 above input boxes, in this time, if you click save, the system will save the new coordinates. If you don't drag-drop the map icon. The system won't update the coordinates into 2 above input boxes and the map coordinates do not change as your case.
Thanks
Dam