Lost rating in win rated BG

[Enkim]

Character name: Enkim
Bug description: After a win in rated bg I lost rating

I don't know if there's any character log for rating history to confirm my case. I had that problem once in the past. This time I was aliance in two last bgs. One ended in Draw, another in win. As a result my rating drop below 1600.

I have screenshots, but only after bgs - so not any good evidence.

Please, consider my case.