Do the start and end dates in the header not apply?

Summary:

When the [Use order date for order price] field is selected in the order price setting of the comprehensive purchase agreement.

Comprehensive Purchase Agreement 'A'
Header Start Date: December 1, 2025,
Header End Date: December 8, 2025,

Comprehensive Purchase Agreement 'B'
Header Start Date: December 9, 2025,
Header End Date: January 31, 2026,

Creation Date: December 1, 2025,

Requested Delivery Date: January 1, 2026（Readtime 30days）

When a MinMax request is submitted,Comprehensive Purchase Agreement B will be applied.

Content (please ensure you mask any confidential information):

Even if I check [Use order date for order pricing], does it not take effect based on the header start and end dates?

Version (include the version you are using, if applicable):