1

I got demoted?

I've been in division 3 since season 4, always finished middle of the pack in my league (anywhere from 3rd to 8th).

I finished this past season in 7th and today got demoted to division 4. Why did this happen only now and not all the times before?
2
#1 gets promoted
#7th-10th gets demoted

If you stayed in the same division, there might have been afk teams higher up the ranks.