More tweaks to EventDispatcher on/off docs.

Signed-off-by: Grant Skinner <info@gskinner.com>

Author: gskinner

src/createjs/events/EventDispatcher.js

@@ -184,9 +184,11 @@ this.createjs = this.createjs||{};
 	 * only run once, associate arbitrary data with the listener, and remove the listener.
 	 * 
 	 * This method works by creating an anonymous wrapper function and subscribing it with addEventListener.
-	 * The created anonymous function is returned for use with .removeEventListener (or .off).
-	 * <b>To remove a listener added with `on`, you must pass in the returned wrapper function as the listener, or use
-	 * {{#crossLink "Event/remove"}}{{/crossLink}}</b>
+	 * The wrapper function is returned for use with `removeEventListener` (or `off`).
+	 * 
+	 * <b>IMPORTANT:</b> To remove a listener added with `on`, you must pass in the returned wrapper function as the listener, or use
+	 * {{#crossLink "Event/remove"}}{{/crossLink}}. Likewise, each time you call `on` a NEW wrapper function is subscribed, so multiple calls
+	 * to `on` with the same params will create multiple listeners.
 	 * 
 	 * <h4>Example</h4>
 	 * 
@@ -257,8 +259,8 @@ this.createjs = this.createjs||{};
 	 * A shortcut to the removeEventListener method, with the same parameters and return value. This is a companion to the
 	 * .on method.
 	 * 
-	 * <b>To remove a listener added with `on`, you must pass in the returned wrapper function as the listener. See 
-	 * {{#crossLink "EventDispatcher/on"}}{{/crossLink}} for an example.</b>
+	 * <b>IMPORTANT:</b> To remove a listener added with `on`, you must pass in the returned wrapper function as the listener. See 
+	 * {{#crossLink "EventDispatcher/on"}}{{/crossLink}} for an example.
 	 *
 	 * @method off
 	 * @param {String} type The string type of the event.