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If MTD shows in places of the number, then the statement is for the current period, and therefore will not have a number applied.
Incorrect Balance
If the totals on a statement do not balance, or items charged to the account are not showing then use Re-Calculate Account to correct this balance.
Highlight the affected account
In Debtors, select Tools > Options > Recalculate Account
This may take a while as it goes through the entire sales history for this account. Any changes to balances of any statements are reported at the completion of this function. If it reports that no changes have been made then everything recorded on this account is arithmetically correct so fix any other discrepancies with a Journal Entry