How to stop advancements lines switch

Hi there,
I just added hidden advancements at the end of lines to allow players to see all the advancements of my games (1203) cauz the basic system couldn't fully show them. Now i'm wondering if there is a way to stop the advancements lines order from switching after every reload, cauz i would like to define with precision the structure of the progress trees...
For example, i would like to force the longest line (of the screen) to be at the bottom of the section...
Can we do that ? How ?