Side effects of custom sort tag with alphabetical grouping

[eseb63]

Hello,
I've noticed strange behavior when using alphabetical grouping for an indexTag with a custom sort associated with it.

• indexTags: Work_Rating, Work_Rated:Work (Work_Rated = concatenation of Work and Work_Rating)
• itemTags: Work, Work_Sort
• TagValue: Work_Listing.value.sort={Work_Sort}
• alphaGroup: all=50
  

I made test for Schumann works:
example:

• Work_Rated: "Variations pour Piano Op. 1 "sur le nom de Abegg" (1829-30)     ♪♪♪♪♪"
• Work_Sort: 08Romantique§Schumann, Robert§Instrumental§Op. 1§Variations pour Piano Op. 1 "sur le nom de Abegg" (1829-30)"
  

Instead of finding this work in group "V", I find it in group "#" with all the other Schumann works having the label Work_sort (therefore starting with the same prefix): what does this group correspond to? Does the symbol # represent a number?

I have two albums containing this work; on one, it appears on a single track; on the other, it is spread across six tracks. By adding the letter "Z" to the first position of the Work_Sort label on the first album (single track), I find the work in its correct group "V" and no longer in the group "#", even though the tracks on the second album have a Work_Sort label starting with "08".

I've noticed another problem: if I specify alphagroup="all", the indextags are correctly grouped alphabetically, except for Work_Rated:Work; omitting the alias doesn't change anything; I think this is another side effect of the Work_Sort tag.

thanks in advance for advice