I think it may have something to do with the time. I know you said 13 hours, but did you just create your account, or did you open it a while ago? I think that plays a factor too. There is a few threads with info about it under the Newbie section.
I created it like a couple weeks ago. It says on my profile I registered Oct. 22. I see people with like 3 day registration with 30+ activity.