iOS Updates - Creating additional Home Screen icons

When I update the app via the settings menu, sometimes (not all times) it’ll create two additional Home Screen icons. One named Voyager and another named vLemmy.

I have previously had the app on my Home Screen with both these names. I’m guessing it’s weird legacy config from previous installs.

How exactly does the update feature work? Why, if it’s a web app, do I need to update at all? Doesn’t it just auto update when you load the app?

What is this witchcraft?