The Business Area input control in AAI's reporting engine doesn't show the tree of Business areas in the correct order.
The order should be the same as the BA tree in the thick client
Release : 6.4.4
This has been resolved in AAI 6.4.5 with the new Reporting Server 2.0 version.
You must upgrade both AAI and the Reporting Server.
The AAI 6.4.5 Release notes can be found here.
You can download both AAI 6.4.5 and the Reporting Server 2.0 from here.