Hi @natascia,
Welcome to the community! Kindly please be informed that the issues you have raised can be solved on how you design your survey form. For details, please have a look at the instructions outlined below:
Regarding your first and second query:
If you generally design your xlsform as outlined in the image below,
You should see the problem that you are facing:
Reference xlsform: With issues
Calculate Calculation Test_0.xlsx (10.2 KB)
But if you design your xlsform as outlined in the image below,
You should see the problems being addressed (here you are able to see the label of the calculated variable as well as you are able to see the Mean, Median, Mode and Standard Deviation):
Reference xlsform: Issues solved
Calculate Calculation Test_1.xlsx (10.3 KB)
Regarding your third query:
Yes, you could see the workaround as shown in the image above.
Have a great day!