Unfortunately, the only xmltv with polish EPG guide does not provide tags if something is new or rerun.
Even worse there is often wrong date of original airing and title of each episode in the guide is just title of the show. Here below is a screenshot for a "Królowa piękności".
But as you see at least show description of each episode is correct. So could Channels in such case differentiate between "that was recorded and it's in database" and 'this is new" also as a last resort do checks on show description? Manual selection for recording is a bit of a pain.