didStartMonitoringForRegion getting called twice for one startMonitoringForRegion

I have started region monitoring by calling startMonitoringForRegion.But I found that didStartMonitoringForRegion is getting called two times also didEnterRegion is getting called twice. But I'm calling startMonitoringForRegion only once. My code

- (void) enableRegionMonitoring:(NSMutableDictionary *)locationInfoDic{

NSLog(@"started Loc Mon");
locMgr = [[CLLocationManager alloc] init];
[locMgr setDelegate:self];
NSString *locationId=[[NSString alloc]init];
double latitude=[[locationInfoDic objectForKey:@"lat"] doubleValue];
double longitude=[[locationInfoDic objectForKey:@"lon"] doubleValue];
if([locationInfoDic objectForKey:@"key"]){
    locationId=[locationInfoDic objectForKey:@"key"] ;
}else{
    locationId=@"NA";
}

CLLocationCoordinate2D myMonLocation = CLLocationCoordinate2DMake(latitude, longitude);
CLRegion *myRegion = [[CLRegion alloc]
                      initCircularRegionWithCenter:myMonLocation
                      radius:100
                      identifier:locationId];
[locMgr startMonitoringForRegion:myRegion
                          desiredAccuracy:kCLLocationAccuracyBest];

}





- (void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region{
NSLog(@"Region monitoring started\n%@",[region description]);
}

Try debugging. If you don't have the time to figure it out, simply ignore the 2nd didEnterRegion . ie If didEnterRegion called two times consecutively for same region simply ignore 2nd one.