fix inconsistent doc

@@ -363,7 +363,7 @@ typedef enum : NSUInteger {
 /** Whether to position cluster markers at the weighted center of the points they represent. If `YES`, position clusters in weighted fashion. If `NO`, position them on a rectangular grid. Defaults to `YES`. */
 @property (nonatomic, assign) BOOL positionClusterMarkersAtTheGravityCenter;
 
-/** Whether to order cluster markers above non-clustered markers. Defaults to `NO`. */
+/** Whether to order cluster markers above non-clustered markers. Defaults to `YES`. */
 @property (nonatomic, assign) BOOL orderClusterMarkersAboveOthers;
 
 @property (nonatomic, assign) CGSize clusterMarkerSize;