Calculator app attaches to Computer icon on taskbar (see screenshot)

When I open the calculator app, for some reason it associates with the Computer icon on the task bar instead of the calculator app's own icon. Why?

Not sure but, it might be a Start 10 thing!
I've had a glitch or two like that; something to do with Start 10 creating it's own Win32 based App shortcuts.
I don't think I ever investigated it though, it just went away.

I solved the issue by removing and replacing the icons but I found that the black icon in the below screenshot causes the problem while the white icon does not.