The "Get Out" waypoint is used for the unit which is getting out of the helicopter. The "Unload" or "Transport Unload" waypoints are the ones given to the helicopter. You then link or sync the two waypoints together. If you don't link an "Unload" waypoint with a "Get Out" waypoint then the "Unload" waypoint will be ignored.
If you use "Transport Unload", the helicopter will empty itself at the nearest "H" regardless.