Hi @luca_bolognini
On the last part of your query i.e. managing data from repeat groups, I would like to suggest that you look at the discussion that happened here and probably substitute family with fish
On a much larger issue, the main issue you are trying to do is not possible
This is because you are using an XLS of your data as opposed to an XLS form from your survey. You need to get this XLS form from the approach shown below