I have deleted all my Stack Exchange profiles recently through support. They have deleted them all and all my user profiles in various SE sites have disappeared as expected. Now, I wanted to start over again and register from scratch, the problem here is Stack Exchange still recognizes me and still gives me the 100 free rep (sometimes). The first profile I created was on Stack Overflow and it was OK, then whenever I register it recognizes me as an old user and gives me a 100 free rep (while I do not have any actual rep on any site), for example here on Meta and on Super User.
Ooh yea, what's even worse, my old user's chat messages are now mine! So the chat user is not deleted and my new user is basically the old user..
Ooh yea again, An old question which was posted more than a year ago is associated with my NEW user profile in SU now! I thought when I delete my profile all my questions are de-associated from my profile. What's the story?
Why do all the Stack Exchange sites still recognize me? is this an expected behavior?