"Your Balance" on the Challenges tab (and on the Wallet page) reflects your Net winnings (+/- any deposits or withdrawals you have made). "Total Winnings" on the Recent Visits tab reflects your Gross winnings (Total of all Challenge payouts).
"Your Balance" on the Challenges tab (and on the Wallet page) reflects your Net winnings (+/- any deposits or withdrawals you have made). "Total Winnings" on the Recent Visits tab reflects your Gross winnings (Total of all Challenge payouts).