Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/LearningDesign.java
===================================================================
diff -u -r174fa126cd5cc9d88eb39d6596af0453a2b77e49 -r12a10b3a9b214f1207131e316912fdc6710d4992
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/LearningDesign.java	(.../LearningDesign.java)	(revision 174fa126cd5cc9d88eb39d6596af0453a2b77e49)
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/LearningDesign.java	(.../LearningDesign.java)	(revision 12a10b3a9b214f1207131e316912fdc6710d4992)
@@ -5,9 +5,10 @@
 
 import java.io.Serializable;
 import java.util.Date;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
+import java.util.TreeSet;
+
 import org.apache.commons.lang.builder.EqualsBuilder;
 import org.apache.commons.lang.builder.HashCodeBuilder;
 import org.apache.commons.lang.builder.ToStringBuilder;
@@ -331,8 +332,8 @@
 	public int hashCode() {
 		return new HashCodeBuilder().append(getReadOnly()).toHashCode();
 	}	
-	public HashSet getParentActivities(){
-		HashSet parentActivities = new HashSet();
+	public TreeSet getParentActivities(){
+		TreeSet parentActivities = new TreeSet(new ActivityOrderComparator());
 		Iterator iterator = this.getActivities().iterator();
 		while(iterator.hasNext()){
 			Activity activity = (Activity)iterator.next();
@@ -343,7 +344,7 @@
 	}	
 	public Activity calculateFirstActivity(){
 		Activity firstActivity = null;
-		HashSet parentActivities = this.getParentActivities();
+		TreeSet parentActivities = this.getParentActivities();
 		Iterator parentIterator = parentActivities.iterator();
 		while(parentIterator.hasNext()){
 			Activity activity = (Activity)parentIterator.next();