It is interesting. If I am in the RD picker I can only select the combination of 4/4 (and 6/8 or 12/8)
But if I am in the style picker I can select either 4/4, or (6/8 or 12/8), or only 12/8
I have approx 10900 styles.
If a select only 12/8 and 8ths I get 109 styles all genres that have time signature 12/8 stated.
Of those are ca 38 Jazz if sorting on genre from the column, and 66 if sorted from categories Everything Jazz.
What signatures the RDs underneath the styles have seems to vary but of the 66 styles 38 RDs have 128 in their names (but it might be a lot of duplicates). I have not listen to any of them.