Curious indexFormat Behaviour

[qblack]

I have a long Title.displayFormat defined in the tagFormat property that has required breaking down into two parts in order to give me the desired result in the display of the Title in my control points:

Title.displayFormat={$shortcomposer^^: $workmovement$titletag}

(titletag is an alias for title; shortcomposer is the composer's last name)

In turn, in front of this definition, the tag WorkMovement, declared in the indexTags property, is defined:

WorkMovement.indexFormat={$work^$movementnumber$movement^: ^^. }

It works well and removes extra spaces that eventuate if I try to define Title.displayFormat in one go.

The creation of the WorkMovement index is redundant for searching purposes (can one hide it?) but I had a look at the index generated anyway, expecting to see every track listed like:

Adagio and Allegro, Op. 70: 1. Langsam, mit innigem Ausdruck
Adagio and Allegro, Op. 70: 2. Rasch und feurig

For the most part, however, I'm seeing these entries melded thus:

Adagio and Allegro, Op. 70: 1. 2. Langsam, mit innigem Ausdruck. Rasch und feurig

The work and all its movements are on one line: work followed by all the movement numbers separated by full stops and spaces, then the movement names similarly separated.

It seems that something is broken, though as yet I have discerned no practical ramifications.