diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/TaskGroup.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/TaskGroup.java
index 6154ed273..850ef0153 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/TaskGroup.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/TaskGroup.java
@@ -216,6 +216,11 @@ public class TaskGroup extends TaskElement {
         return false;
     }
 
+    public void fitStartAndEndDatesToChildren() {
+        setIntraDayStartDate(getSmallestStartDateFromChildren());
+        setIntraDayEndDate(getBiggestEndDateFromChildren());
+    }
+
     public IntraDayDate getSmallestStartDateFromChildren() {
         return Collections.min(getChildrenStartDates());
     }
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java
index b62b88f72..225dcb808 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java
@@ -46,18 +46,19 @@ import org.navalplanner.business.planner.entities.DayAssignment;
 import org.navalplanner.business.planner.entities.ResourceAllocation;
 import org.navalplanner.business.planner.entities.Task;
 import org.navalplanner.business.planner.entities.TaskElement;
+import org.navalplanner.business.planner.entities.TaskGroup;
 import org.navalplanner.business.planner.entities.consolidations.Consolidation;
 import org.navalplanner.business.resources.daos.IResourceDAO;
 import org.navalplanner.business.resources.entities.Resource;
 import org.navalplanner.business.scenarios.entities.Scenario;
 import org.navalplanner.web.calendars.BaseCalendarModel;
 import org.navalplanner.web.planner.allocation.AdvancedAllocationController;
-import org.navalplanner.web.planner.allocation.AllocationResult;
 import org.navalplanner.web.planner.allocation.AdvancedAllocationController.AllocationInput;
 import org.navalplanner.web.planner.allocation.AdvancedAllocationController.IAdvanceAllocationResultReceiver;
 import org.navalplanner.web.planner.allocation.AdvancedAllocationController.IBack;
 import org.navalplanner.web.planner.allocation.AdvancedAllocationController.Restriction;
 import org.navalplanner.web.planner.allocation.AdvancedAllocationController.Restriction.IRestrictionSource;
+import org.navalplanner.web.planner.allocation.AllocationResult;
 import org.navalplanner.web.planner.order.OrderPlanningModel;
 import org.navalplanner.web.planner.tabs.CreatedOnDemandTab.IComponentCreator;
 import org.zkoss.ganttz.extensions.ITab;
@@ -188,6 +189,16 @@ public class AdvancedAllocationTabCreator {
             taskElementDAO.reattach(task);
             allocationResult.applyTo(currentScenario, task);
             taskElementDAO.save(task);
+            updateParentsPositions(task);
+        }
+
+        private void updateParentsPositions(TaskElement task) {
+            TaskGroup current = task.getParent();
+            while (current != null) {
+                current.fitStartAndEndDatesToChildren();
+                taskElementDAO.save(current);
+                current = current.getParent();
+            }
         }
     }