Please help me start up with tags

[simbun]

I don't have ios to test your control point, and I'm not sure what 'Sorted by quality' is, but assuming you're just saying that if you Enqueue from a top level index e.g. Genre, then it adds everything below it to your playlist (the same songs from [n] Albums, [n] items e.t.c.), then that's probably the expected behaviour. I assume if you make the selection and then enqueued from '[n] albums' it works as expected.
BubbleUPnP has a setting to remove duplicates so you're able to enqueue from a top level folder, but it's control point specific so you'll have to dig into the settings.
MinimServer does have the setting listViewAlbums which tells MinimServer when to take you directly to an album view (which would prevent duplicates), but if you set this too high you'll only ever be able to make a single index selection.

On an unrelated note, the other thing you'll probably want to install is BubbleUPnP server (unless all your renderers are OpenHome compatiable), which creates proxies for your renderers to give them OpenHome capabilities. This means the queues (and responsibility for advancing tracks) are held on the (proxy) renderer, otherwise you'll have to stick to a single device/control point and make sure it's always on. This does however mean your control point must also be OpenHome compatiable, which I'm pretty sure Lumin is but not sure about 8-player.