Hello, friends!

I've got rating changes +93, +120, -107, -50, +143 in last month. Why are they so huge? Aren't they supposed to be like +20, -11, -23, +60 (one time in a month!!), +21?

Has anyone experienced something like that? Is it okay? Why is it happening?

P.S. I got a feeling that the post will get downvoted...