Duplicate DNS issue with GoDaddy

Need help
1

I have three hosted sites with Bubble. The domain name is at GoDaddy. At first when I added the DNS for each of these, they were working. Now I noticed that the first one stll works and the other two are disconnected.
Issue

  1. I notices that the DNS given to me by Bubble are all identical.

  2. When I noticed that my two sites were not showing (they were for about two months at first) , I called Godaddy and spoke to three different tecs. Each told me that the DNS I am trying to add are duplicate and wont work. They directed me back to Bubble. Bubble repeats the same thing, that I am to add the DNS (the same ones) to Godaddy. Nothing more is available there.

  3. What am I to do. I see some posts that talk about cheapname and cloudflare etc. Does this mean that I have to go to a third party to make this work? Why does it not work directly with Godaddy? Why the DNS are the same for all three sites?
    Help is most appreciated.