With the new page size, margins, and style definitions, the La victoire en équipe story no longer fits the three columns. You'll need to adjust the yellow box and each of the text blocks.
To make it easier to work, you'll first magnify the top half of page 3.
Adjust the view of the page if necessary so you can see all three columns in the top half of the page.
Select the pointer tool, and then select the yellow box. Depending upon where you click, you may need to hold down Ctrl (Windows) or Command (Macintosh) and click again to select the box and not the text block.
Drag the box until its top edge rests ...