By rank up requirement do you mean only collecting the 25 Mercenary Rank points?

Btw regarding Mercenary Rank point i have done nyzel from lvl 1 to 100, yet I only apply for promotion once (yah I know I am clumsy) , don’t’ tell me all my hard work went in vain T_T? so each floor now I will just get only 1 Mercenary rank instead of 5?