Index: lams_common/src/java/org/lamsfoundation/lams/lesson/LessonClass.java
===================================================================
diff -u -r8b271e1b06efcbe0b323b7071cdecf693e322c60 -r267ac152a113b91adbdbe98ac3601ac08b686b11
--- lams_common/src/java/org/lamsfoundation/lams/lesson/LessonClass.java	(.../LessonClass.java)	(revision 8b271e1b06efcbe0b323b7071cdecf693e322c60)
+++ lams_common/src/java/org/lamsfoundation/lams/lesson/LessonClass.java	(.../LessonClass.java)	(revision 267ac152a113b91adbdbe98ac3601ac08b686b11)
@@ -163,7 +163,7 @@
     	int originalNumber = learnersGroup.getUsers().size();
    		learnersGroup.getUsers().addAll(newLearners);
    		int newNumber = learnersGroup.getUsers().size();
-   		return originalNumber - newNumber;
+   		return newNumber - originalNumber;
     }
 
     public Group getLearnersGroup() {
@@ -215,7 +215,7 @@
     	int originalNumber = staffGroup.getUsers().size();
     	staffGroup.getUsers().addAll(newStaff);
    		int newNumber = staffGroup.getUsers().size();
-   		return originalNumber - newNumber;
+   		return newNumber - originalNumber;
     }
 
     /**