Yes. With v20.03.0 onwards, we have enabled Sentry reporting of panics seen in the Dgraph application. https://dgraph.io/docs/master/howto/#using-the-dgraph-sentry-integration
As a result, you will see 2x the number of instances of Alpha and Zero and the dupe instances are just simple monitoring processes for reporting events. This should not cause any issues.
From v20.03.1, You can also turn off this behavior by setting the enable-sentry=false option for the alpha and zero instances.