I'm suddenly a different user...

This is just something interesting that happened a few months ago. I logged onto discussions.apple.com but everything looked very odd. When I clicked my username it was some random other person (Wish I took a screenshot). After clicking on the username I could see the full account activity. Finally I got a little suspicious and logged out never to see it again. I have never experienced an issue like this although I have heard that it is VERY rare that somehow my browser got the wrong authentication causing me to log into a random account? It has never happened since, hope someone enjoys this story or has an answer.