Too many albums displayed on Lumin

[Donuk]

I have quite a large collection of CDs on my Melco N1/A, driven by Lumin app on my iPad. When I scan my 3500 CDs with Twonky it shows about 3500 and is fine. When I scan with Minimserver I get nearly 4000 CDs.

This seems to be because for many orchestral CDs it breaks down individual works showing them as separate CDs. For example, the CD,
Telemann: Concertos & cantata Ihr Völker Hört
shows each work as a separate CD (with the same album cover!)
i.e
Telemann - Concerto in E major twv53 - Andante
Telemann - Concerto in E major twv53 - Allegro
Telemann - Concerto in E major twv53 - Siciliano
Telemann - Concerto in E major twv53 - Vivace

The above appear as an album called
Telemann: Concerto in E major twv53

and the next four tracks appear as an album called, e.g.
Telemann: Concerto in A minor twv52

and so on.

If I use Linn Kazoo app a similar thing happens - it lists all the Concerti, and then you click on each one to reveal the files of the movements.
When I use Twonky this does not happen - it shows all the files on a CD in the same directory - which I prefer.

In the metadata (I use Tag Editor) album names, artist and album artist are consistent.

I do not understand the subtleties of Minimserver -
in indexTags I have Album, Date, Genre, AlbumArtist, Composer, Year
in TagFormat I have Title.displayFormat={$title^$date^ ~ ^$composer^ [^]} - I like to see composer.

Under TagOptions, I have all.ignore.sort={The,A,An,Der,Die,Das,Le,La,Les,Un,Une,Il,El},

So what am I doing wrong?

Cheers
Donuk - sunny downtown York (at last)