When you are recording Fox shows during prime time, which tuner does your TV Activity screen say is being used for Fox? Are the shows being recorded on the same tuner as the other three networks (just without the automatic recording PTAT functionality for Fox) or is it using a separate tuner for Fox? This would go a long way in helping to determine whether the receiver is actually recognizing that the station is a Fox affiliate. For what it's worth, ever since I switched to Hopper Duo, I have gotten used to having to set separate timers for shows on the four major networks, but still having them record on the same tuner. That is the Hopper Duo's stripped-down version of the PTAT feature. (And also, of course, no AutoHop for any programming recorded with Hopper Duo.)