BUG in "Add Event" when entering artist with vocal AND instrument attributes at the same time

[chaban]

They are intentionally split.

Inconsistent presentation (storage?) of artist-memberof-group relations

If you look at the members of the group Manfred Mann’s Earth Band the UI presentation seems to be inconsistent. Why has Manfred Mann a kind of joined list of instruments and vocals and the other members not. I entered several entries for another artist of another band within one commit and one relation but he got the presentation unjoined, too. Is this a bug or feature?