diff --git a/main/gradebook/lib/GradebookUtils.php b/main/gradebook/lib/GradebookUtils.php
index 39f3093ff8..9e91154d31 100644
--- a/main/gradebook/lib/GradebookUtils.php
+++ b/main/gradebook/lib/GradebookUtils.php
@@ -918,7 +918,7 @@ class GradebookUtils
             $table->updateCellAttributes($row, $column, 'colspan="' . $columns . '" align="center" class="row_odd"');
         }
 
-        $params = array(
+        $pdfParams = array(
             'filename' => get_lang('FlatView') . '_' . api_get_utc_datetime(),
             'pdf_title' => $title,
             'course_code' => $course_code,
@@ -926,8 +926,10 @@ class GradebookUtils
         );
 
         $page_format = $params['orientation'] == 'landscape' ? 'A4-L' : 'A4';
-        $pdf = new PDF($page_format, $params['orientation'], $params);
-        $pdf->html_to_pdf_with_template($table->toHtml());
+        $pdf = new PDF($page_format, $page_format, $pdfParams);
+        $pdf->html_to_pdf_with_template($flatviewtable->return_table());
+        // Default
+        //$pdf->html_to_pdf_with_template($table->toHtml());
         exit;
     }
 
diff --git a/main/gradebook/lib/flatview_data_generator.class.php b/main/gradebook/lib/flatview_data_generator.class.php
index d5aace389d..325d02d327 100755
--- a/main/gradebook/lib/flatview_data_generator.class.php
+++ b/main/gradebook/lib/flatview_data_generator.class.php
@@ -197,10 +197,10 @@ class FlatViewDataGenerator
 
                     $list = [];
                     $list['items'] = $finalList;
-                    $list['header'] = $mainHeader;
+                    $list['header'] = '<center>'.$mainHeader.'</center>';
                     $headers[]= $list;
                 } else {
-                    $headers[] = $mainHeader;
+                    $headers[] = '<center>'.$mainHeader.'</center>';
                 }
             }
         } else {
@@ -231,7 +231,7 @@ class FlatViewDataGenerator
             }
         }
 
-        $headers[] = api_strtoupper(get_lang('GradebookQualificationTotal'));
+        $headers[] = '<center>'.api_strtoupper(get_lang('GradebookQualificationTotal')).'</center>';
 
         return $headers;
     }
@@ -499,7 +499,11 @@ class FlatViewDataGenerator
                         if (!$show_all) {
                             if (api_get_configuration_value('gradebook_detailed_admin_view')) {
                                 $finalList = array_merge($linkScoreList, $evalScoreList);
-                                $average = array_sum($finalList) / count($finalList);
+                                if (empty($finalList)) {
+                                    $average = 0;
+                                } else {
+                                    $average = array_sum($finalList) / count($finalList);
+                                }
                                 $finalList[] = round($average, 2);
                                 foreach ($finalList as $finalValue) {
                                     $row[] = '<center>'.$finalValue.'</center>';