[mythtv-users] Why does mythtv decide to postpone a recording?

[Marco Nelissen]

A few times now, MythTV decided it would not record an episode of
Grey's Anatomy because the same episode is on again a week later.
The scheduled recordings screen says something like "won't record -
later showing", and shows it plans to record the week after.
There are no conflicts (Grey's is one of two shows I record that
day, and I have three tuners).
So why does mythtv insist on recording an episode a week late (running
the risk of a schedule change causing it to miss the episode entirely),
when it could have just recorded it when it was on the first time?