You can change the order of agenda regions by editing the agenda in the meeting screen.
Grab the region that you want to move by hovering your mouse pointer over it and pressing your left-mouse button and holding it.
Drag the region to where you want to place it. A hand image indicates the current drop location.
Release the left mouse button to drop the region in that location.
The region arrangement is saved upon dropping it, and the agenda is renumbered accordingly