So I am using the latest version of Modern mix  and most of the time when I use the X to close the app it does not remove it from the taskbar.  It still shows there as running, even after it has left the screen.  Sometimes they do completely shutdown, but I am not sure what causes a program to close versus stay in the task bar.

Any help would be appreciated

Helpful system info

AM 920/MSI GD955

Windows 8.1

2 monitors, HIS 290r7 video

Razer Synapse 2.0 

Razer Mamba (legacy Driver)