Worried about a Keylogger

I am trying like mad to get to the bottom of this. A couple of nights ago at about midnight I went to log onto my wow account and was unable to. I had left my account logged in and it had auto-logged out about 20 minutes prior to that.
At first I thought that I had just mistyped my password but then I remembered an e-mail in my junk folder from Blizzard that I had written off as being a phishing e-mail. So I did a password recovery and was able to get back in. I called Customer Service this morning and it seems there were quite a few different password reset requests on my account and the password had been reset twice, once 4 hours before I had done it myself but oddly enough during that time I had been disconnected a couple of times and was able to log back in using the old PW.
At any rate I have since changed my e-mail and ran everything I have in my arsenal for finding a key logger from Malwarebytes, Spybot, Hijack This, and AVG to try and find a keylogger both while wow was and was not running. Nothing was found. I have an authenticator but I am at a loss here. Nobody but myself has access to my account or the answers to my secret question so I have no clue how the password was reset the first time because I did not initiate that. In the famous words of Scooby Doo... REEEELLPPP!!!