Editing Borders

I don't know if this has ever happened to you but it happened to me sometimes.
When i tried to edit a country border, in some places that border was a curve instead of a straight line (http://prntscr.com/14qt42).
I hope admins will fix this because im tired of having to edit a whole country.

If I am not wrong you were editing China: SouthWest. There seems to be something wrong with those borders. I am sorry but you got to delete and redo the borders there.

China southwest, russia volga and USA texas.
i didnt found more yet.

Just copy the border, and pasted it.