Service integration posting twice (BB-7752)

One of my repositories, Passport Tracker Repository, is integrated with AppHarbor via the service integration feature so that each commit let's AppHarbor know there's new code.

However, my last 2 commits caused 2 builds each to start on AppHarbor. It looks like the service sent 2 notifications instead of one.

Can you guys look into it and see what's up? I haven't changed my repository settings since I setup the repository so I don't know what I could have done to cause this.