Re-running guided setup will not make a difference. Never do it with a tech there as they will surely want to leave. Just use the test channels feature in the settings to see if the channels are coming in on the correct channels. I live in the same area and the channels updated a midnight the day Charter said they would. Have you tried having Charter install a cablebox and see if you get the same channels as your TiVo? I assume they have tried switching out cablecards? If the cable box gets the correct channels and your TiVo doesn't, then the issue is at the headend.