The monthly earnings have nothing to do with the balance YPN shows under total balance. Pending balance shows an estimated amount on what your earnings will be. To see the estimated total on what your earnings will be for the month of May only, use the Performance Report and change the Date Range to 'Last Month'.
The earnings for May have not continued into this month as the totals do not show until the next day, and since it is only June 1st, it is impossible to do so.
