A negative value in such a report of All Expenses would indicate that you entered a deposit or credit against an expense category. (e.g. you entered a refund, rebate or store credit, against groceries, clothing or electricity etc.)
You erroneously entered a deposit or credit that should've been a payment or charge. In such a case you would, of course, have a balance discrepancy.
If neither of these scenarios are the case, then perhaps a screenshot of the actual report results along with a detailed explanation of the problematic transaction along with a screenshot of the actual transactions in their respective registers.
Keep in mind that these are public forums. Make sure to redact sensitive information from the screenshots (if any).