Reminds me of how Pokemon work: a level 70 Blastoise isn't necessarily older than a level 5 Squirtle, it's just been trained more. For all we know, the Squirtle could actually be older than the Blastoise.
It's not like you were active since 2007, just having an old account won't get rid of the newbie tag, you hadn't even posted anything since 2011 before this:P