After the July Cook-Off my rating changed from 1590 to 1627 but my highest rating is displayed as 1590 & there is no change in the rating graph as well. The last update was up till 1590.
I mailed to CodeChef’s bug email ID yesterday but it hasn’t been fixed yet.
There maybe some issue with the server, don’t worry, sooner or later the graph will be updated and their will be no harm to your ratings
keep coding, stay healthy