TyroPiccard, EXACTLY!!
That's what I always try to say. This means that up to touchdown, there was nothing wrong, or at least the crew was not aware that something was wrong. If there would have been - zack! Go Around!
This means nothing else that the problem started AFTER touchdown.
I still don't find any argument against my reasoning:
They touched down, thought that they shouldn't touch the "faulty" engine no. 2, left it where it was, no deceleration, the rest is history.
Dani