Help? How Many Monitors? WMR Display Adaptor Properties.

[Avago Earo]

Whilst checking the BIOS version of my GPU, out of curiosity I looked at Colour Management in Display Adaptor Properties. In the Devices tab. As well as Nvidia GTX 970 Monitor there was also this in the drop down:

Display 1/2 Mixed Reality Headset Nvidia Geforce GTX 970
Display 1/2 Mixed Reality Headset Nvidia Geforce GTX 970
Display 3 Mixed Reality Headset Nvidia Geforce GTX 970
Display 4 Mixed Reality Headset Nvidia Geforce GTX 970
Display 5 Mixed Reality Headset Nvidia Geforce GTX 970

There is also a Check Box for, 'Use My Settings For This Device', which is unchecked so I've left it for now as I don't know what effect it will have.

Why are there so many Displays for WMR on my PC?

Does this have anything to do with the 'Mirroring' warning I get in SteamVr For Windows Mixed Reality? Should I make any changes (I'm getting occasional flashing artefacts in ED (Lenovo Explorer)

I tried uploading a Snip image (PNG) but couldn't.