Band/group members Vs. Musicians

If I click on a link to an artist/band/group there's three fields:
awards, links & notes. When I right-click in that view there's a post called "Properties". I click on that and find a tab that's called " Line-up" I have already entered all the band members on the Albums properties (under the tab "Musicians").

I'd really like to be able to view ALL the bands/groups members when I click on "Band - Properties - Line-up".

I mean if a person is a playing on a album he's surely "connected" to that band/group .. he has played as a musician, why doesn't he shows up as a musician on that band/group?

If this isn't a fault that can be blamed by the entity between the chair and the keyboard, then there's a LOT of double work ahead :-(