I am not an airbus pilot...
But I was always under the impression that once the a/c has left approach mode and gone into land mode, the engines will idle automatically regardless of whether the levers are 'in or out'???
I was also under the assumption that the a/c will go through the autoland motions on the PFD whether the autopilot is in or not...hence thrust idle at 30ish feet?
I could be talkin out of my bum cheeks though!!