That is terrible and I would be annoyed myself if I constantly had notifications always interrupting me. That's good you were able to turn off the notifications within the app. Now you just have to go into Settings, Sound notification, Default notifications and you will then be able to turn the sound off. Due to the age of the device, you have limited options to manage notifications other than sounds but you may want to try going back into the app to see if you have selected "favorites" or "reminders" For more helpful information, you can check out this link: https://www.verizonwireless.com/support/motorola-droid-maxx-2/how-to-use/.
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