Anyone know where this adsense code is on pages?

Hey,

I bought a site and have changed the adsense code in a wordpress plugin but each post still has adsense from the old owner but I dont know where it is coming from…

Just an example is here

My adense ends in 789 and the other is
876

I have no idea where it is coming from :s

Hope someone can help

Thanks

The page I need help with: [log in to see the link]