but what do you think about the fact that the front part has emerged again when the ship broken up?
I am not aware that any researcher has this as a "fact".
This could explain why the decks are collapsed on the rear of the front part?
No, aside that she broke directly in front of the 3rd funnel which can be seen at the wreck, the debris, especially the tower debris with the 3 funnel base as well as the pantry piece speak against it. The hull plates at the break area come loose from the frames, the force of it hitting the bottom bend the decks downwards.