I put two models in the same endpoint, then only one was running,

without providing version number, you are overriding the models (because this is the same endpoint)

I started another docker container having a different port number and then the curls with the new model endpoint (with the new port) started working

Seems like misconfiguration on the first one?

, which apparently I can't specify when I establish the model endpoint but I need to re compose the docker container by passing an env variable to it????

When you spin the model you can tell it any additional packages you might need

also random tasks are popping up in the DevOps project in the UI

Not random 🙂 these are the service instances (basically increased visibility into what's going on inside the serving containers