Problem in finding a second chromecast device

Hi I am running a wd mycloud (firmware V04.01.04-422) and running the latest android app (phone is running 4.4.2) and I have installed the wd mycloud app from google playstore and it only finds one chromecast device, not my second. I can cast from my netflix app to both devices without issue, and the chromecast app shows both devices on my phone. But when using the my cloud app only one shows. Can you advise? I have tried uninstalling and resinstalling to no avail.

Can you give chromecast devices names? I know it ought to use the IP address, but…

It picks up the set device names as configured on the chromcast setup initially