Your problem is a mystery to me. WRLH RF-26 (FOX) appears to be on the same tower as several other Richmond TV transmitters. They all transmit very strong signals to your location. It is curious that WRLH is allowed in the same market as adjacent channel WTVR RF-25 (CBS). Usually, the FCC requires at least one channel separation between stations in the same market--much less the same tower. Perhaps, the problem is that your primary tuner cannot deal with adjacent channel interference between WRLH and WTVR. Test the antenna using a different TV [or tuner] if you have one.
Oh, I overlooked the fact that your problem is with a TiVo. Not such a big mystery. There is a growing list of posters on this forum who have TiVo tuner issues. If
Electron's recommendation does not solve your problem, then I recommend ditching the TiVo. Look into the
ChannelMaster CM-7400 HD DVR or its older
CM-7000PAL DVR.