inappbilling NOTIFY_EVENT is being called multiple times & making random push notifications

Android - inappbilling mobile 2.2.1 - Titanium Studio, build: 3.2.3.201404181442

I tested this on both an HTC ONE M7 Android 4.4.2 & a Samsung Galaxy S4 Active 4.2.2

I'm having a bit of trouble when using NOTIFY_EVENT. My in-app purchasing is fairly simple - after purchase, the app goes to my remote server and downloads a .JSON file to load into a database. That part all works (I put the code into the if (checkBillingResponse.responseCode == InAppBilling.RESULT_OK){) code and as soon as the Google Play window popped up, the file is downloaded. That was just to test, it's out of there now :)

It seems as though NOTIFY_EVENT is being called multiple times, sometimes 10-12 times. I've read that using NOTIFY_EVENT is the only way to get PURCHASE_STATE_CHANGED_EVENT to fire... Is this correct? I couldn't get it to work until I used NOTIFY_EVENT.

Anyway, here's my code for the in-app purchasing part:

Buybutton.addEventListener('click',function(e)
{ 
 
var synchronousResponse = InAppBilling.requestPurchase({
        productId: storeID,
        productType: InAppBilling.ITEM_TYPE_INAPP,
    });
});
 
InAppBilling.addEventListener(InAppBilling.NOTIFY_EVENT, function(e) {
    var synchronousResponse = InAppBilling.getPurchaseInformation({
        notificationIds: [e.notifyId]
    });
    a=JSON.stringify(e.notifyId);
   alert(a); //THIS makes 10-12 pop up windows with different responses
});
 
InAppBilling.addEventListener(InAppBilling.PURCHASE_STATE_CHANGED_EVENT, function(e){
 
        download(fileName);
        //UPDATE DATABASE CODE IS HERE
        winDialog.show();
        db.close();
 
});

Also I usually get a 'Purchase Failed' Push Notification when this fires (only 1) and it says the purchase failed, BUT it always for a product I DIDN'T purchase at that time. I only ever get 1 of those notifications per button click, but 10-12 of those alerts.

The PURCHASE_STATE_CHANGED_EVENT is being called AND it's working correctly in that aspect, but the app will sometimes freeze with all the alerts going on (even if I comment that line out, the app will hang and crash, but when I open the app again, what I wanted to buy is purchased).

There is only 1 instance of these eventlisteners in my app. I don't have them in any other .JS files.

Let me know if you need to see any other code. Thanks for looking!