As a side note, no explanation has been given why the THS did not reach the 14 deg limit ?
The Boeings have an electric stop a degree or so prior to full travel, from which the trim limits can only be reached by rotating the trim wheel manually.
I don't know if this is true for the Airbus since there is no electric 'trim switch' as such to run the trim to its electric stops to see where they are.
IIRC I think at relatively forward CG's you might temporarily see max nose up autotrim positions of around 11 degrees during deceleration as you initially configured the aircraft for approach....well inside the 13 degree setting.
If you extend the slats below 20,000 very near or in the stall, IIRC 11 degrees is about where you initially end up, prior to acceleration.
It's a good question.
(Thanks to PJ for the THS info.)