Tracks belonging to album groups

[simbun]

I'm playing with trying to integrate some types of playlist into the MinimServer tag index sections (rather than simply have them as a long list), and I've come unstuck at the first step/test.

As a first step I'm using tagUpdate to simply tag the tracks in a playlist as a Favourite (have a value of 1), but when testing this, if a favourite track is part of a group and I filter on Favourites, all the songs belonging to that album group are also returned. Is this intended behaviour?