Door View Cam - 4 motion detection notifications

How can I get the vibration notification to go off just once on my Android phone?

At present, when I get a motion alert, I get 2 sets of 2 vibrations, the second set maybe half a second after the first. My wife’s iPhone vibrates just once.

The Cam is connected to Alexa, too so could it be that the Ring app and Alexa are notifying me? If so, how do I turn notifications from one of them off?