Index: moodle/mod/lamslesson/lang/en/lamslesson.php
===================================================================
diff -u -rf723563ee637c0bcf6b391830f8e12e451a26258 -r3d9bff42a178790991088c19a24651e0dc5ed9ee
--- moodle/mod/lamslesson/lang/en/lamslesson.php	(.../lamslesson.php)	(revision f723563ee637c0bcf6b391830f8e12e451a26258)
+++ moodle/mod/lamslesson/lang/en/lamslesson.php	(.../lamslesson.php)	(revision 3d9bff42a178790991088c19a24651e0dc5ed9ee)
@@ -77,6 +77,8 @@
 $string['restcallfail'] = 'Call to LAMS failed: received no response or connection was refused. Please check that you have the correct LAMS server URL and that it is online.';
 $string['sequencenotselected'] = 'You must select a sequence to proceed.';
 $string['previewthislesson'] = 'Preview this lesson';
+$string['updatewarning'] = 'Warning: selecting another sequence than the current one will create a new lesson for the students. This might result in some slightly confused students';
+$string['currentsequence'] = 'Current sequence:';
 
 // view.php
 
Index: moodle/mod/lamslesson/lib.php
===================================================================
diff -u -rc35069ead69cd62058df201bd7f75d289d20dd1c -r3d9bff42a178790991088c19a24651e0dc5ed9ee
--- moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision c35069ead69cd62058df201bd7f75d289d20dd1c)
+++ moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision 3d9bff42a178790991088c19a24651e0dc5ed9ee)
@@ -100,11 +100,14 @@
 function lamslesson_update_instance($lamslesson) {
     global $DB;
 
+    //Get first the original record and check whether the sequence_id has changed of not
+    $originallamslesson  = $DB->get_record('lamslesson', array('id' => $lamslesson->instance));
     $lamslesson->timemodified = time();
     $lamslesson->id = $lamslesson->instance;
 
-    # You may have to add extra stuff in here #
-    lamslesson_add_lesson($lamslesson);
+    if ($originallamslesson->sequence_id != $lamslesson->sequence_id) {
+      lamslesson_add_lesson($lamslesson);
+    }
 
     return $DB->update_record('lamslesson', $lamslesson);
 }
Index: moodle/mod/lamslesson/mod_form.php
===================================================================
diff -u -rc35069ead69cd62058df201bd7f75d289d20dd1c -r3d9bff42a178790991088c19a24651e0dc5ed9ee
--- moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision c35069ead69cd62058df201bd7f75d289d20dd1c)
+++ moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision 3d9bff42a178790991088c19a24651e0dc5ed9ee)
@@ -31,17 +31,27 @@
 
 $PAGE->requires->yui2_lib('yahoo-dom-event');
 $PAGE->requires->yui2_lib('treeview');
-$PAGE->requires->yui2_lib('event');
-$PAGE->requires->yui2_lib('connection');
+
 require_once($CFG->dirroot.'/course/moodleform_mod.php');
 
 class mod_lamslesson_mod_form extends moodleform_mod {
 
     function definition() {
       global $COURSE, $USER, $CFG;
+
         $mform =& $this->_form;
 
-//-------------------------------------------------------------------------------
+        if (!empty($this->_instance)) {
+	  $sequence_id = $this->current->sequence_id;
+	  $currentsequence = get_string('currentsequence','lamslesson');
+	  $updatewarning =  get_string('updatewarning','lamslesson');
+	} else {
+	  $sequence_id = 0;
+	  $currentsequence = '';
+	  $updatewarning = '';
+	}
+
+    //-------------------------------------------------------------------------------
     /// Adding the "general" fieldset, where all the common settings are showed
         $mform->addElement('header', 'general', get_string('general', 'form'));
 
@@ -120,13 +130,13 @@
 	  
 	  //-->
 </script>
-<div class="centerlink">
-    <span id="authorbutton" class="yui-button yui-link-button"><span class="first-child">
-    <a onclick="openAuthor('$authorurl','author',0)" href="#nogo">$openauthorlabel</a>
-    </span></span>
+<div id="buttons" style="float:right;">
     <span id="previewbutton" style="visibility:hidden;" class="yui-button yui-link-button"><span class="first-child">
     <a onclick="openPreview('$previewurl','preview',0)" href="#nogo">$openpreviewlabel</a>
     </span></span>
+    <span id="authorbutton" class="yui-button yui-link-button"><span class="first-child">
+    <a onclick="openAuthor('$authorurl','author',0)" href="#nogo">$openauthorlabel</a>
+    </span></span>
 </div>
 
 XXX;
@@ -141,6 +151,8 @@
     // display user's lams workspace
     $lds = lamslesson_get_sequences_rest($USER->username, $COURSE->id, $COURSE->fullname, $COURSE->timecreated, $USER->country, $USER->lang) ;
 
+    
+
     // html "chuck" for YUI tree
     $html = <<<XXX
      <script type="text/javascript">
@@ -165,6 +177,7 @@
      </script>
 
 <div id="treeDiv"></div>
+<div id="updatesequence"></div>
 <script type="text/javascript">
 var tree;
 tree = new YAHOO.widget.TreeView("treeDiv",[
@@ -173,13 +186,20 @@
 // expand only the first two nodes
 tree.getNodeByIndex(1).expand(true);
 tree.getNodeByIndex(2).expand(true);
+
+if ($sequence_id > 0) {
+  var node = tree.getNodeByProperty('id', $sequence_id);
+  var sequenceName = node.label;
+  var updateDiv = document.createElement('div');
+  updateDiv.setAttribute('class','note');
+  updateDiv.setAttribute('id','currentsequence');
+  updateDiv.innerHTML = '<p>$updatewarning</p><strong>$currentsequence ' + sequenceName +'</strong>';
+  document.getElementById('updatesequence').appendChild(updateDiv);
+}
 tree.render();
 tree.subscribe('clickEvent',function(oArgs) {
     selectSequence(oArgs.node.data.id, oArgs.node.label);
   });
-
-
-
 </script>
 
 XXX;
@@ -190,14 +210,13 @@
         $mform->addElement('header', 'selectsequence', get_string('selectsequence', 'lamslesson'));
 
         $mform->addElement('static', 'sequencemessage', '', $html);
-	
+
 //-------------------------------------------------------------------------------
         // add standard elements, common to all modules
         $this->standard_coursemodule_elements();
 //-------------------------------------------------------------------------------
         // add standard buttons, common to all modules
         $this->add_action_buttons();
-
     }
 	
     function validation($data) {
Index: moodle/mod/lamslesson/styles.css
===================================================================
diff -u -rc35069ead69cd62058df201bd7f75d289d20dd1c -r3d9bff42a178790991088c19a24651e0dc5ed9ee
--- moodle/mod/lamslesson/styles.css	(.../styles.css)	(revision c35069ead69cd62058df201bd7f75d289d20dd1c)
+++ moodle/mod/lamslesson/styles.css	(.../styles.css)	(revision 3d9bff42a178790991088c19a24651e0dc5ed9ee)
@@ -3,6 +3,7 @@
 .path-mod-lamslesson .centerlink {text-align:center;padding-top: 15px; padding-bottom:5px;}
 .path-mod-lamslesson .progress-header {text-align:center;font-weight: bold;padding-top: 5px; padding-bottom:5px;}
 .path-mod-lamslesson .super {position:relative;bottom:0.5em;color:red;font-size:0.8em;}
+.path-mod-lamslesson .note {border:solid 1px #DEDEDE;background:#FFFFCC url([[pix:t/stop]]) 8px 16px no-repeat;color:#222222;padding:10px;text-align:center;}
 
 /* Button styles */
 #authorbutton a {text-decoration:none;padding-left: 2.25em;background: url([[pix:i/admin]]) 5% 50% no-repeat;}