This suggests that, somehow, your Property Tax Receivable account is actually your special Undeposited Funds account that has been renamed.
When you record and A/R Customer Payment received, does it appear in that account? If so, then it is the Undeposited Funds account.
If this is the case, the only solution I can think of is to set up a new account and then edit the Journals and change them to use the new account instead of the Property Tax Receivable account. Then, rename the Property Tax Receivable account to Undeposited Funds, its original name.
