I was refreshing the status page waiting for the contest to finish. When final tests finished I found out that I wasn't logged in, but in the top right corner of the page there was written another's user name:

Screenshot

Screenshot after refreshing the page

Screenshot after refreshing again

At this point, I went to the homepage (I wasn't logged in there) and I logged with my username. After logging the status page was correctly showing my username in the top corner. Maybe it is a security issue.