I've just found the explanation: in the graph I have Family in Columns and in the table Family is in the Rows.
My question now is How I must change the formula if I would like to mantain Family in Rows?
It is normal that the formula doen't work when the variable is in the Rows?
In your Tableau 6 workbook, there are 83700 marks on the Computes view. In your Tableau 7 workbook, there are 92970 marks. This could either be due to the workbooks being different or you running into a difference in how Tableau pads data that changed between version 6 and 7.
When I open the Tableau 6 workbook in Tableau 7, those 83700 marks are now 92970 marks. So, I think we're safe in assuming that Tableau 7's new padding behavior is what is throwing your calcs off. Basically, Tableau 7 pads more often than Tableau 6 did.
I don't have a very clear idea of what you intended with your table calcs and you've got so much in the level of detail for the view (two dimensions on rows, two on columns, two sets in the LoD that use some of the dimensions already in the view) and the nested table calcs are complex enough that I'm not really able to help more. I suggest you start with a view with all the dimensions on a single Row, and build your table calcs from there so that they give you the expected results in Tableau 7. Once you have that working, then you should be able to move into crosstabs or charts and have the calcs work.