I’ve seen this a lot over the years but it never really bothered me enough to pose the question. It still isn’t really bothering me because it’s easy to fix. But it’s time to ask.
First, my Tablo is setup to not record duplicates. And it doesn’t always do what I’m describing below. Most of the time it only records one occurrence of each episode.
Why does Tablo setup the same exact episode to record twice at the same time but from two different channels? One channel is to my north the other to the south, both MeTV. Normally this would not cause a conflict with a two tuner Tablo, but it is also doing the same exact thing with episodes of Barney Miller on Antenna TV at the same times. After removing the duplicates for both Petticoat Junction and Barney Miller the conflicts are now cleared.