top vs bottom rows

Hi,
I am investigating an existing report...
The report has two table visual with the same fields

table1 shows top 5 data whereas table2 shows bottom 5 data

I am unable to see how the data is being retrieved for top and bottom in these two visuals

I checked and the fields are exactly the same whereas the data is different.

How can I identify how the two tables are pulling data to make them have different data displayed?

Thank you