Hi
I set my settings the same as you and tested, all ok for reading and writing market data to a specific sheet, with no market sheets added.
You need to connect MF to Excel manually first, once only, but all markets added after that transfer data fine with a trigger.
This is the sequence I did:
Open Excel workbook
In MF click Launch Excel
You will get a message asking if you want to connect to the open workbook, answer yes
You now have a connection to the workbook and it should transfer data without any problems. If you have unticked all the settings, no market sheets or bets sheet will be added.
If you close the Excel workbook you will lose the Excel connection and MF will need to be restarted to reconnect to Excel.
Hope that helps.