i think it arobot make this process , the process take less 1.5 minutes and i really amazed by what happened .
Go to ipleak.net and see what your IP is.
In the authorization e-mail from Blockchain (by the way, I'd personally advise you to remove it from the OP), can you confirm that the IP you have just verified with ipleak.net is the same as the one in your e-mail?
If not, you might have authorized someone else's login instead of yours.