diff --git a/cura/CuraActions.py b/cura/CuraActions.py
index d6e5add912..4d121338d8 100644
--- a/cura/CuraActions.py
+++ b/cura/CuraActions.py
@@ -67,11 +67,15 @@ class CuraActions(QObject):
                 current_node = parent_node
                 parent_node = current_node.getParent()
 
-            #   This was formerly done with SetTransformOperation but because of
-            #   unpredictable matrix deconstruction it was possible that mirrors
-            #   could manifest as rotations. Centering is therefore done by
-            #   moving the node to negative whatever its position is:
-            center_operation = TranslateOperation(current_node, -current_node._position)
+            # Find out where the bottom of the object is
+            bbox = current_node.getBoundingBox()
+            if bbox:
+                center_y = current_node.getWorldPosition().y - bbox.bottom
+            else:
+                center_y = 0
+
+            # Move the object so that it's bottom is on to of the buildplate
+            center_operation = TranslateOperation(current_node, Vector(0, center_y, 0), set_position = True)
             operation.addOperation(center_operation)
         operation.push()
 
diff --git a/plugins/PostProcessingPlugin/scripts/PauseAtHeight.py b/plugins/PostProcessingPlugin/scripts/PauseAtHeight.py
index 2a055b86ac..a9e570e0cb 100644
--- a/plugins/PostProcessingPlugin/scripts/PauseAtHeight.py
+++ b/plugins/PostProcessingPlugin/scripts/PauseAtHeight.py
@@ -507,7 +507,15 @@ class PauseAtHeight(Script):
                     else:
                         Logger.log("w", "No previous feedrate found in gcode, feedrate for next layer(s) might be incorrect")
 
-                    prepend_gcode += self.putValue(M = 82) + " ; switch back to absolute E values\n"
+                    extrusion_mode_string = "absolute"
+                    extrusion_mode_numeric = 82
+
+                    relative_extrusion = Application.getInstance().getGlobalContainerStack().getProperty("relative_extrusion", "value")
+                    if relative_extrusion:
+                        extrusion_mode_string = "relative"
+                        extrusion_mode_numeric = 83
+
+                    prepend_gcode += self.putValue(M = extrusion_mode_numeric) + " ; switch back to " + extrusion_mode_string + " E values\n"
 
                 # reset extrude value to pre pause value
                 prepend_gcode += self.putValue(G = 92, E = current_e) + "\n"