double inAppPurchase when logged in with TestUserAcoount - in-app-purchase

Question

when i´m logged in with my testUserAcount, my inAppPurchases runs twice the buyAction. why is that? when my testUserAccount is not logged in, the buy action runs correctly:
-(void)fetchProducts{
NSLog(#"fetchProdukts");
SKProductsRequest *request = [[SKProductsRequest alloc]initWithProductIdentifiers:[NSSet setWithArray:self.products]];
request.delegate = (id)self;
[request start];}
-(void)productsRequest:(SKProductsRequest*)request didReceiveResponse:(SKProductsResponse *)response{
self.products = response.products;}
-(void)request:(SKRequest *) request didFailWithError:(NSError *)error{
NSLog(#"%#", error);}
-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
for (SKPaymentTransaction *transaction in transactions) {
//PURCHASED
switch (transaction.transactionState) {
case SKPaymentTransactionStatePurchased:
[[SKPaymentQueue defaultQueue]finishTransaction:transaction];
if ([transaction.payment.productIdentifier isEqualToString:#"StarMultiplier1"]) {
NSLog(#"Multiplier unlocked");
[self buyMultiplierAction];
}
if ([transaction.payment.productIdentifier isEqualToString:#"add15000Stars3"]) {
NSLog(#"Stars buyed");
[self buyStarsAction];
}
if ([transaction.payment.productIdentifier isEqualToString:#"unlockArtefacts3"]) {
NSLog(#"Artefacts unlocked");
[self buyArtefactsAction];
}
if ([transaction.payment.productIdentifier isEqualToString:#"addPowerUps4"]) {
NSLog(#"PowerUps buyed");
[self buyPowerUpsAction];
}
break;
//NOT PURCHASED
case SKPaymentTransactionStateFailed:
[[SKPaymentQueue defaultQueue]finishTransaction:transaction];
NSLog(#"Error: %#", transaction.error);
(when logged in)
for every action i get the logs twice. my code is correct.
???