In my experience it's not always so
look at the team that made it to the finals in BBB, venividiveni bf, and lost to torooo.
started in division 5, every season won the division he was promoted to, so won div 5, 4, 3, 2, 1, and came to finals in BBB...
friend of mine, in his second season here, after winning division 4, will play finals in division 3...
you can't generalize... and what's wrong with alphabetical order anyway... it makes no difference whatsoever