Confluence posts to HipChat even when "Notify watchers" is not selected

Hi,

when I am adding/editing a Confluence page and don't select the "notify watchers" checkbox (sorry, I am using the german version so I am not sure how it is called in english), the HipChat room is notified.
I think it is expected, that the HipChat room is just a watcher, like everybody else?

I am using the OnDemand instance, and it happens in the current version (not sure about the version).