I see what you're saying.
I think the problem is the Sort. In the last example I attached, move the Group up a level with the arrows on the right in the window at the bottom and change the 'Group On' to "ZONA". Move the 'Otra direcciones en este zona' report to the 'Group On' Footer (add the footer by clicking 'More' in the 'Group On', then change "without a footer section" to "with a footer section"), and move the other text boxes back to the 'Details' section. Lastly, move the 'Nuevas direcciónes' report to the 'Group On' footer, as well. That SHOULD resolve the issue.