Separators in custom fields

[edj]

I have been using field Custom 6 to build playlists. Sounds odd but it's because I hate having actual .m3u (etc) playlist files - they don't transfer well between systems. A nightmare when you have the same collection mirrored on different devices. So Custom 6 contains the playlist title and MS or whatever music software I'm using searches Custom 6 to automatically create playlists.

My problem is that the Custom field doesn't seem to be respecting ";" in the same way as other fields in MS, ie when I want to use the field to assign a song to more than one playlist.

For example, if I tag a song's genre as "Funk; Electronica", it won't create a new genre entry called "Funk; Electronica", instead the song will simply appear in both genres. This is the desired outcome.

However with this Custom field, rather than the song appearing in both "playlists", Custom shows an entry including the ";".

So using the Funk/Electronica example, if I have two playlists, one called Funk and one called Electronica, if I want a particular song to be in both, then MS shows a playlist called "Funk; Electronica" rather than splitting it into both Funk and Electronica.

So I guess the question is: how do I force MS to respect ";" separators in custom tag fields?

Hope the above makes sense and I haven't confused things by referring to playlists when I don't really mean playlists!!