I'm having a problem with my 500 setup. I have a cable splitter running from the wall to two cable boxes. One cable box is used locally, and the other used for slinging abroad. For some strange reason, when I change my channel on the slingbox via the web, it changes the channel on the box that is not even hooked up to the slingbox in my living room. Is the problem that I'm using a splitter? These cable boxes are close to each other, but not that close. My service is through Comcast.