How to ordering pages according to group

[imrnmln]

Hello,
I want to display data by group, but when previewing the page order not correctly.
For example:
I want to display page like this
Page 1: Data A1
Page 2: Data A2
Page 3: Data B1
Page 4: Data B2
But when preview page show like this
Page 1: A1
Page 2: B1
Page 3: A2
page 4: B2
How to solve this problem? Thank you so much

[Lech Kulikowski]

Hello,

Please send us a sample report with test data that reproduces the issue for analysis.

Thank you.