its not supposed to. it only watches the folder while tixati is running.
But when I add a new torrent file, all the ones added previously to my watch folder(while the client wasn't running) get added. So clearly it can detect differences, but doesn't automatically do so on startup.
So the scenario is:
Download abc.torrent file into /watching
Start Tixati
abc.torrent does not get added
Download xyz.torrent into /watching
Now both abc.torrent and xyz.torrent get added
The functionality I would expect is that at the point where you start the client, all new .torrent files in the /watching directory get added on startup.