Genre displayed as numbers??

[haegar33]

Hello,
I am aware that the Genre Tag can be either a numeric index or a text value. In my library I have a mix of both. I would expect that Minim exhibits the Genre always a text using a standard lookup table when encountering a Genre numerical index.
However on my client I see Genres like 2, 4 or even with brackets (3), (5)...
When sorting alphabetically by Genre this numbers are on top and only later the "normal" text values are displayed...

Anything wrong with my config?

Thanks, Haegar