Index: lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java
===================================================================
RCS file: /usr/local/cvsroot/lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java,v
diff -u -r1.100 -r1.101
--- lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java	9 Apr 2015 11:37:28 -0000	1.100
+++ lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java	23 Jun 2015 17:37:03 -0000	1.101
@@ -1931,7 +1931,7 @@
     }
 
     private Integer getCoord(JSONObject details, String tag) throws JSONException {
-	Integer coord = (Integer) JsonUtil.opt(details, tag);
+	Integer coord = ((Number) JsonUtil.opt(details, tag)).intValue();
 	return (coord == null) || (coord >= 0) ? coord : ObjectExtractor.DEFAULT_COORD;
     }
 
Index: lams_central/web/includes/javascript/authoring/authoringActivity.js
===================================================================
RCS file: /usr/local/cvsroot/lams_central/web/includes/javascript/authoring/authoringActivity.js,v
diff -u -r1.49 -r1.50
--- lams_central/web/includes/javascript/authoring/authoringActivity.js	19 Jun 2015 17:51:25 -0000	1.49
+++ lams_central/web/includes/javascript/authoring/authoringActivity.js	23 Jun 2015 17:37:03 -0000	1.50
@@ -463,11 +463,13 @@
 	 * Draws a Parallel (double) Activity container
 	 */
 	parallelActivity : function(x, y) {
-		if (x == undefined || y == undefined) {
-			// if no new coordinates are given, just redraw the activity
-			x = this.items.shape.getBBox().x;
-			y = this.items.shape.getBBox().y;
+		// if no new coordinates are given, just redraw the activity or give default value
+		if (x == undefined) {
+			x = this.items ? this.items.shape.getBBox().x : 0;
 		}
+		if (y == undefined) {
+			y = this.items ? this.items.shape.getBBox().y : 0;
+		}
 		
 		if (this.childActivities && this.childActivities.length > 0) {
 			// draw one by one, vertically
@@ -1484,4 +1486,4 @@
 		
 		branchingActivity.longestBranchLength = longestBranchLength;
 	}
-};
+};
\ No newline at end of file