[mythtv] Powersearch and finding duplicates does not work

[Pascal Favre]

I noticed that duplicate finding is not working for a powersearch.
Although, after pressing record to save the powersearch the regular recording screen is shown, where the duplicate finding algorithm 
can be specified.
Is this a bug or a feature ?
Which other settings (max. episodes, delete oldest, etc) are not honored ?
Does it make sense to popup the 'regular' recording screen ?
Seen on mythtv 0.18.1.

Pascal