Thank you for the new input, I´m still lacking a bit of information here 
There is an option in the sheet menu to display all formulas instead of the values:
That will help me a lot.
Could you make another screenshot of the Sheet with this option turned on?
Further, what I already see is, that you will not get the right results if your table is in not below all READ formulas. If that is a lot of space to be used for you, you can either use a different sheet or transpose the READ() function. User ctrl while drag to do so.
Another way could maybe also be the usage of the loop element for arrays for example:
But that’s just for inspiration.