I tried using incognito mode to login at Dpreview.com. Afterwards, however, I forgot to logout and just closed Chrome. Then I remembered that I needed to logout (it was a shared computer). I revisited dpreview.com using incognito mode again. To my surprise, Dpreview.com seemed to remember me. It didn't give me the option to login but to logout instead.
It is my understanding that going incognito does not leave any trace behind. If it is true, how come Dpreview remembered me? Am I missing something here?