As in most flying mishaps it will not be one event but a combination of errors which lead to the end result.
Roger
I still hold with my quote above. We still dont know the circumstances that lead to this or the explanation the pilot has given.
Taking what you saw and heard as being correct doesnt explain why?
For all we know the pilot may have been ill and decided to land over rather than go around?
Unlikely but my point is that we do not know.
Normally a pilot will be handed from one frequency to another. He may indeed take down the wrong frequency make a call and get no response.
The previous frequency would be in the standby position and easely called back.
If the pilot landed over we have to question why! Whatever presuming that he saw the aircraft lined up on or near the numbers there would have been some reason in his mind that made him decide he would be better on the ground than risking a go around and another approach.
Most pilots of that calibre level are not idiots so would still love to know his explanation? It could have simply been overload which can happen in SPO
Pace