Sonoff dual to control shutters

Rollershutter Sonoff6 "lounge1" (GF_Kitchen) { autoupdate="true" }

The autoupdate will do nothing because there is no binding on the item.

Change your items to:

Group:Rollershutter Shutters
Rollershutter Sonoff6 "lounge1" (GF_Kitchen, Shutters) { autoupdate="true" }

Your sitemap:

	Frame label="Master Shutters Control" {
			Switch item=Shutters icon="blinds" mappings=[UP="All Open"]
			Switch item=Shutters icon="blinds" mappings=[DOWN="All Closed"]
    } 

You are repeating your code a lot, have a look at:

and