Rating Updation Problem

I took part in the august long challenge and the code starters 8
The admin told me that firstly rating for the august long challenge will be calculated and then for the starters but after long challenge i came to div2 .
Now I have 2 questions:

  1. After I came to Div2 why was my rating updated for the starters as the contest is rated for div 3 only.
  2. If the rating had to be updated why my div3 rating was not taken into account the rating I had while participating in the contest.