diff --git a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/HeaderCell.java b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/HeaderCell.java
index 9637f53b9be..924b9f75f3c 100644
--- a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/HeaderCell.java
+++ b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/HeaderCell.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2023 BSI Business Systems Integration AG
+ * Copyright (c) 2010, 2026 BSI Business Systems Integration AG
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -35,9 +35,6 @@ public void setColumnIndexInternal(int index) {
     if (currentColIndex < 0) {
       doSetColumnIndex(index);
     }
-    else {
-      LOG.warn(null, new IllegalAccessException("do not use this internal method"));
-    }
   }
 
   protected void doSetColumnIndex(int index) {
diff --git a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/columns/AbstractColumn.java b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/columns/AbstractColumn.java
index 6b7409650e3..c048ec47858 100644
--- a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/columns/AbstractColumn.java
+++ b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/columns/AbstractColumn.java
@@ -1502,6 +1502,11 @@ public boolean isEmpty() {
   }
 
   public void setColumnIndexInternal(int index) {
+    int currentColIndex = getColumnIndex();
+    if (currentColIndex >= 0) {
+      LOG.warn("Unexpected column index {} for column {}", currentColIndex, this, new Exception("Stacktrace"));
+      return;
+    }
     m_headerCell.setColumnIndexInternal(index);
   }
 
diff --git a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/OrganizeColumnsForm.java b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/OrganizeColumnsForm.java
index 16183319df8..f3849e98294 100644
--- a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/OrganizeColumnsForm.java
+++ b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/OrganizeColumnsForm.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2025 BSI Business Systems Integration AG
+ * Copyright (c) 2010, 2026 BSI Business Systems Integration AG
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -1111,6 +1111,9 @@ public void applyConfig(String configName) {
       m_organizedTable.getReloadHandler().reload(IReloadReason.ORGANIZE_COLUMNS);
     }
     getColumnsTableField().reloadTableData();
+    // After reloading, the columnsTableField now contains the expected columns in the correct order
+    // -> ensure the order of columns is correctly applied to the table
+    updateColumnVisibilityAndOrder();
   }
 
   protected void applyConfigImpl(String configName) {
diff --git a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/ShowInvisibleColumnsForm.java b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/ShowInvisibleColumnsForm.java
index 852893472f1..419ec23dda9 100644
--- a/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/ShowInvisibleColumnsForm.java
+++ b/org.eclipse.scout.rt.client/src/main/java/org/eclipse/scout/rt/client/ui/basic/table/organizer/ShowInvisibleColumnsForm.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2024 BSI Business Systems Integration AG
+ * Copyright (c) 2010, 2026 BSI Business Systems Integration AG
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -264,10 +264,17 @@ protected void execStore() {
         newCols.add(col);
         col.setVisible(true);
       }
-      if (m_insertAfterColumn == null || newCols.isEmpty()) {
+      if (newCols.isEmpty()) {
         return;
       }
-      ColumnSet colSet = newCols.get(0).getTable().getColumnSet();
+
+      ITable table = newCols.getFirst().getTable();
+      if (m_insertAfterColumn == null) {
+        ClientUIPreferences.getInstance().setAllTableColumnPreferences(table);
+        return;
+      }
+
+      ColumnSet colSet = table.getColumnSet();
       List<IColumn<?>> newOrder = new ArrayList<>();
       List<IColumn<?>> visibleColumns = colSet.getVisibleColumns();
       int position = 0;
@@ -305,7 +312,7 @@ else if (newPosFirst != -1 && posInsertAfter == -1) {
         i++;
       }
       colSet.setVisibleColumns(newOrder);
-      ClientUIPreferences.getInstance().setAllTableColumnPreferences(newCols.get(0).getTable());
+      ClientUIPreferences.getInstance().setAllTableColumnPreferences(table);
     }
 
     @Override