Q:

Multiple League of Legends Icons on Dock

I have kept the application League of Legends in my dock since I use it very often, however, whenever I launch the application, it creates another icon in the dock. 
One icon has a "running" dot and the other doesn't. 
Is there a way to fix this issue or remove the second icon? 

A:

macOS Mojave has a configuration to show recently used application icon in the Dock. In order to disable it, uncheck Show recent applications in Dock under System Preferences → Dock.
Application with support for opening documents minimize into Dock in their own separate icon. To disable that behavior, check to Minimise windows into application icon under System Preferences → Dock.

