the order of dances is different because the dances are put in easier order for syllabus and harder in Championship.
Doing a sow, dreamy waltz, then a stacccato tango, a strenuous and fast V Waltz, then slowing to molasses for a foxtrot, then finishing with the fastest, a quickstep, makes Championship more sportslike.
Same with Latin. Cha Cha and Samba, fast and energetic, then put the brakes on for Rhumba, Paso which is very diff technique than Rhumba, and finishing with the fastest and most stenuous.