Nested Push Issue

Button 1
- (IBAction)btnFavCol:(id)sender {
    [self chkResponse];
}
-(void)chkResponse
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    NSString *email = [defaults objectForKey:@"email"];
    NSString *passWord = [defaults objectForKey:@"passWord"];
    NSLog(@"user name is = %@ and password is = %@",email,passWord);

    NSString *parameterisedUrl = [NSString stringWithFormat:@"http://www.coloragon.com/ajax_svc.php?controller=fetchFavouratePalletColors&email=%@&password=%@",email,passWord];
    NSURL *url = [NSURL URLWithString:parameterisedUrl];

    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [NSURLConnection connectionWithRequest:request  delegate:self];
    NSURLResponse *response;
    NSError *error;
    NSData * data = [NSURLConnection sendSynchronousRequest:request
                                          returningResponse:&response
                                                      error:&error];
    if (!error) {
        NSString *str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

        NSLog(@"Login response: is %@",str);

    }
    else{
        NSString *str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

        NSLog(@"Login response: is %@",str); //getting response
        NSLog(@"I am here in else");
    }


}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    NSLog(@"ReceivedResponse");

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    // [self.responseDATA appendData:data];
    colorNamesArray = [[NSMutableArray alloc] init];
    colorHexArray = [[NSMutableArray alloc] init];
    paletteIDArray = [[NSMutableArray alloc] init];
    NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
    NSLog(@"json data is %@",jsonData);
    NSLog(@"object class == %@",[jsonData class]);
    favColorsArray =[jsonData valueForKey:@"r"];
    for(NSArray *tmpArr1 in favColorsArray){
        if([tmpArr1 valueForKey:@"name"]){
            colorName=[tmpArr1 valueForKeyPath:@"name"];
            NSString *colorHex=[tmpArr1 valueForKeyPath:@"colors"];
            NSString *paletteId = [tmpArr1 valueForKey:@"id"];
            [paletteIDArray addObject:paletteId];
            [colorNamesArray addObject:colorName];
            [colorHexArray addObject:colorHex];
        }

    }

    NSLog(@"color names array is %@",colorNamesArray);
    NSLog(@"color hex array is %@",colorHexArray);

    NSUserDefaults *defaultFavColors = [NSUserDefaults standardUserDefaults];
    [defaultFavColors setObject:colorNamesArray forKey:@"colorNamesArray"];
    [defaultFavColors setObject:colorHexArray forKey:@"colorHexArray"];
    [defaultFavColors setObject:paletteIDArray forKey:@"paletteIDArray"];
    [defaultFavColors synchronize];
    FavColorsViewController *favColVC = [[FavColorsViewController alloc] init];
    [self.navigationController pushViewController:favColVC animated:YES];

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    NSLog(@"didFailWithError");

    NSLog( [NSString stringWithFormat:@"Connection failed: %@", error],
          [error description]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

    NSLog(@"connectionFinishLoading");
}

Button 2
- (IBAction)btnFavGallery:(id)sender {

    [self getGalleries];

}
-(void)getGalleries
{

    NSString *parameterisedUrl = [NSString stringWithFormat:@"http://www.coloragon.com/ajax_svc.php?controller=fetchGalleries&email=saad.khalid@digitalnet.com&password=12345"];

    NSURL *url = [NSURL URLWithString:parameterisedUrl];

    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];





    [theRequest setHTTPMethod:@"POST"];


    [theRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];





    NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

    if(theConnection)

    {
        //  NSLog(@"Connection Successful");

        NSURLResponse *response;

        NSError *err;

        NSData *responseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&err];



        NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableLeaves error:nil];



   NSMutableArray  *galleryNameArray = [[NSMutableArray alloc]init];
   NSMutableArray  *galleryIDArray =  [[NSMutableArray alloc]init];

        NSLog(@"json data is %@",jsonData);
        NSLog(@"object class == %@",[jsonData class]);
      NSMutableArray *galleriesArray =[jsonData valueForKey:@"gals"];
        for(NSArray *tmpArr1 in galleriesArray){
            if([tmpArr1 valueForKey:@"name"]){

                NSString *galleryName   = [tmpArr1 valueForKeyPath:@"name"];
                NSString *galID     = [tmpArr1 valueForKey:@"id"];

                [galleryNameArray addObject:galleryName];
                [galleryIDArray addObject:galID];
            }

        }
        NSLog(@"gallery names are %@",galleryNameArray);
        FavGalleriesViewController *favGalVC = [[FavGalleriesViewController alloc] init];
        favGalVC.galleryIDArray = galleryIDArray;
        favGalVC.galleryNameArray = galleryNameArray;
        [self.navigationController pushViewController:favGalVC animated:YES];

    }

    }