created an attachment (id=162624)
report design

description:
value of "sort locale" and "sort strength" for optional y series group can not be remembered in chart builder.

build number:
2.6.0.v20100322-0630

steps to reproduce:
1. open the attached report design, double click to open the chart builder.
2. click "edit group and sorting" button for optional y series group, set 
data sorting: descending,
sort on "row["country"]",
locale: english (united states)
strength: primary
3. click ok to close the dialogue and reopen it.

expected result:
the setting of "locale" and "strength" works.

actual result:
locale changes back to "auto" and strength changes back to "tertiary".

error log:
n/a
fixed by saving the sort locale and strength settings for y optional.
verified in build (2.6.0.v20100323-1015), closed.