Last night when I was testing another question I have open here, I was using the AppleTV remote and noticed that it was affecting iTunes running on my laptop. Basically what was happening is that I was trying to navigate through the on-screen menu on the AppleTV, but instead the input was affecting playback in iTunes. Note, though I do have AirPlay enabled, iTunes was not streaming to the AppleTV at the time.
Is this expected behavior, and if so, what must I do to prevent it?