Bad guide info isn't Tivo's fault. Still it is a problem.

Whenever a show is recorded, there is a ~28 day block on rerecording that same show. This is to stop the Season Pass from filling the drive with copies.

To get around the recent recording block. In the Now Playing list select the miss-recorded show and choose More Options & View Upcoming Episodes. You will get a list of all the upcoming episodes. This list indicates which will or not be recorded. Select the future airing that Tivo thinks has already been recorded, and you will be given the option to record that one explicitly.

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I kind of wish it would be a little smarter in scheduling. Some shows appear in the guide several times, while others only once.

Depending on priorities, the single show can be skipped in favor of a show that might be available for recording only a few hours later.