при покупке приложения запрашивает пароль несколько раз

У меня есть приложение для iPhone на рынке, в котором есть три разных покупки приложений. Проблема в том, что когда пользователь покупает функцию, ему обычно предлагают ввести пароль более одного раза. Это нормально? Это что-то с Apple или с моим кодом?

Вот пример одной из покупок:

        InAppPurchaseManager *manager = [[InAppPurchaseManager alloc] init];

    [manager loadStore];

    if([manager canMakePurchases]){
        [manager purchaseFeature:@"com.myfeature1"];

        VehicleExpensesController *aViewController = [[VehicleExpensesController alloc]
                                                      initWithNibName:@"VehicleExpensesController" bundle:nil];
        [self presentModalViewController:aViewController animated:YES];
        [aViewController release], aViewController = nil;

    }

а вот мой файл InAppPurchaseManager.m:

#import "InAppPurchaseManager.h"
@implementation InAppPurchaseManager


- (void)requestProUpgradeProductData
{
     NSSet *productIdentifiers = [NSSet setWithObjects:@"com.myfeature1", @"com.myfeature2", @"com.myfeature3", nil ];
productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiers];
productsRequest.delegate = self;
[productsRequest start];

// we will release the request object in the delegate callback
}

#pragma mark -
#pragma mark SKProductsRequestDelegate methods

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
NSArray *products = response.products;
proUpgradeProduct = [products count] == 1 ? [[products firstObject] retain] : nil;

if (proUpgradeProduct)
{
    NSLog(@"Product title: %@" , proUpgradeProduct.localizedTitle);
    NSLog(@"Product description: %@" , proUpgradeProduct.localizedDescription);
    NSLog(@"Product price: %@" , proUpgradeProduct.price);
    NSLog(@"Product id: %@" , proUpgradeProduct.productIdentifier);
}

for (NSString *invalidProductId in response.invalidProductIdentifiers)
{
    NSLog(@"Invalid product id: %@" , invalidProductId);
}

// finally release the reqest we alloc/init’ed in requestProUpgradeProductData
[productsRequest release];

[[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerProductsFetchedNotification object:self userInfo:nil];
}
#pragma -
#pragma Public methods

//
// call this method once on startup
//
- (void)loadStore
{
    // restarts any purchases if they were interrupted last time the app was open
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];

    // get the product description (defined in early sections)
    [self requestProUpgradeProductData];
}

// call this before making a purchase
//
- (BOOL)canMakePurchases
{
    return [SKPaymentQueue canMakePayments];
}

// 
// kick off the upgrade transaction
//
- (void)purchaseFeature:(NSString *) identifier
{
SKPayment *payment = [SKPayment paymentWithProductIdentifier:identifier];
[[SKPaymentQueue defaultQueue] addPayment:payment];

}

//
 // saves a record of the transaction by storing the receipt to disk
//
- (void)recordTransaction:(SKPaymentTransaction *)transaction
{
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];

if ([transaction.payment.productIdentifier isEqualToString:@"com.myfeature1"])
{
    // save the transaction receipt to disk
    [[NSUserDefaults standardUserDefaults] setValue:transaction.transactionReceipt forKey:@"DiscountCalculator" ];
    [[NSUserDefaults standardUserDefaults] synchronize];
} 
if ([transaction.payment.productIdentifier isEqualToString:@"com.myfeature2"])
{
    // save the transaction receipt to disk
    [[NSUserDefaults standardUserDefaults] setValue:transaction.transactionReceipt forKey:@"VehicleExpenses" ];
    [[NSUserDefaults standardUserDefaults] synchronize];
}
if ([transaction.payment.productIdentifier isEqualToString:@"com.myfeature3"])
{
    // save the transaction receipt to disk
    [[NSUserDefaults standardUserDefaults] setValue:transaction.transactionReceipt forKey:@"NoAds" ];
    [[NSUserDefaults standardUserDefaults] synchronize];
}
}

//
// enable pro features
//
- (void)provideContent:(NSString *)productId
{
if ([productId isEqualToString:@"com.myfeature1"])
{
    // enable the pro features
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"DiscountCalculatorIsPurchased" ];
    [[NSUserDefaults standardUserDefaults] synchronize];
}else if ([productId isEqualToString:@"com.myfeature2"])
{
    // enable the pro features
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"VehicleExpensesIsPurchased" ];
    [[NSUserDefaults standardUserDefaults] synchronize];
}else if ([productId isEqualToString:@"com.myfeature3"])
{
    // enable the pro features
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"NoAdsIsPurchased" ];
    [[NSUserDefaults standardUserDefaults] synchronize];
}
}

//
// removes the transaction from the queue and posts a notification with the transaction result
//
- (void)finishTransaction:(SKPaymentTransaction *)transaction wasSuccessful:(BOOL)wasSuccessful
{
// remove the transaction from the payment queue.
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];

NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:transaction, @"transaction" , nil];
if (wasSuccessful)
{
    // send out a notification that we’ve finished the transaction
    [[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerTransactionSucceededNotification object:self userInfo:userInfo];
}
else
{
    // send out a notification for the failed transaction
    [[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerTransactionFailedNotification object:self userInfo:userInfo];
}
}

//
// called when the transaction was successful
//
- (void)completeTransaction:(SKPaymentTransaction *)transaction
{
[self recordTransaction:transaction];
[self provideContent:transaction.payment.productIdentifier];
[self finishTransaction:transaction wasSuccessful:YES];
}

//
// called when a transaction has been restored and and successfully completed
//
- (void)restoreTransaction:(SKPaymentTransaction *)transaction
{
[self recordTransaction:transaction.originalTransaction];
[self provideContent:transaction.originalTransaction.payment.productIdentifier];
[self finishTransaction:transaction wasSuccessful:YES];
}

//
// called when a transaction has failed
//
- (void)failedTransaction:(SKPaymentTransaction *)transaction
{
if (transaction.error.code != SKErrorPaymentCancelled)
{
    // error!
    [self finishTransaction:transaction wasSuccessful:NO];
}
else
{
    // this is fine, the user just cancelled, so don’t notify
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}
}

#pragma mark -
#pragma mark SKPaymentTransactionObserver methods

//
// called when the transaction status is updated
//
- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
for (SKPaymentTransaction *transaction in transactions)
{
    switch (transaction.transactionState)
    {
        case SKPaymentTransactionStatePurchased:
            [self completeTransaction:transaction];
            break;
        case SKPaymentTransactionStateFailed:
            [self failedTransaction:transaction];
            break;
        case SKPaymentTransactionStateRestored:
            [self restoreTransaction:transaction];
            break;
        default:
            break;
    }
}
}
@end

Извините, если это много кода - я просто хотел убедиться, что весь соответствующий код попал туда.