Juhl

Hi, My XVM just updated and I noticed that my WN8 has decreased by around 50 points. (From around 1880 to 1826 WN8) This is something I cannot understand because I have performed better than my rating for a long time, including the last 4-5 days since my rating was last updated. (I know that the avg. for that period was above 2000 because I keep track.) So how can my rating go down? If anyone could explain this it would be much appreciated. Thanks. Juhlify