Several push notifications being received with iOS - ios

Question

I'm working on an app that has push notifications enabled. My app it's using push notifications since day 1 with parse.com as the server.
Everything was working fine, I did several app updates and improvements and I had always receive one notification for each push sent by the server, I've also updated from parse 1.7.2 to 1.12.0 without having issues.
Because parse.com was going to terminate its services, I started the migration from parse to Urban Airship (using 7.0.2).
I did several tests, installing and uninstalling the app on my phone, installing the production version (using parse) and installing the development version (using urban airship), everything was working fine, when suddenly and I don't know why, I started receiving 5 notifications per push sent by the server. I thought it was a parse.com problem because at that time my iPhone was running the production version (with parse), but it was not.
When the version (using Urban Airship) was just published, I kept receiving 5 notifications.
I'm totally lost here, I don't have any clue why this is happening, at first I thought it was related with the several installs and uninstalls of the app, so I try:
1. Disabling notifications.-
2. Deleting the app.-
3. Disabling notifications
3.a. deleting the app
3.b. then changing time and date ahead a couple of days
3.c. then turning off the phone
3.d. turning on again and putting the right date
3.e. restarting the phone
3.f. installing the app
None of those worked so far. And I couldn't find anything online about this issue that was clear or solve this issue.
I hope someone could help me.
Extra info:
Swift 2
iOS 8.0+
XCode 7
Pushes are sent by a PHP Server
My AppDelegate.swift (Please notice that I have only included the relevant code, the rest of the code is not related):
import UIKit
import CoreData
import AirshipKit
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
let config: UAConfig = UAConfig.defaultConfig()
UAirship.takeOff(config)
UAirship.push().userPushNotificationsEnabled = true
UAirship.push().resetBadge()
// Get the user settings
let userSettings = NSUserDefaults.standardUserDefaults()
var notify = userSettings.dictionaryForKey("notifications")
let appReset = userSettings.objectForKey("appResetv200")
if appReset == nil {
notify = nil
userSettings.setObject("done", forKey: "appResetv200")
}
if notify == nil {
let notificationTypes = [
"notType1" : true,
"notType2" : true,
"notType3" : true
]
userSettings.setObject(notificationTypes, forKey: "notifications")
UAirship.push().addTag("notType1")
UAirship.push().addTag("notType2")
UAirship.push().addTag("notType3")
UAirship.push().updateRegistration()
}
return true
}
}
I hope someone can help me, everything worked fine when I did the tests on my development environment, and now it's a complete mystery why it's failing.