Inconsistence Extended warranties for all devices

I'm with Ring's Protect Plus plan since January 2019 and covered my ring doorbell, two cameras and alarm system with extended warranty. Two of my cameras have issues and got replaced in 2019 & 2021 respectively. Last week my Ring doorbell has problem to connect to internet. System support told me that because of my doorbell battery is old and needed to be replaced. Unfortunately, my ring doorbell is out of warranty. I asked why the two cameras got replaced but not the doorbell as I purchased three devices together and registered at the same time. His explanation was the record shows in the system the warranty was expired, he cannot give me a replacement. Finally I have ordered a new one online today. Now, I'm still don't understand why some device got replaced but the other didn't. Could be I called in at the wrong time and talked to different person?