That's expected — there is no "mark as paid" action that zeroes out a tutor's running payout total. Payout figures accumulate continuously and never reset on their own.

To see what's owed for a specific pay period, go to Finance → Review Payouts and filter by date range (for example, the 1st–10th of the month) instead of looking for a running balance to go back to zero. This filtered view, not a reset action, is how you check what's due for any given stretch of time.