In order to determine whether or not the minus sign should be removed from an item, the system looks at the G/L account itself to determine whether it is an asset, liability, income, or expense. 

However, for line items that represent totals of multiple accounts, the system does not have a single G/L account to look at to determine whether or not to hide the minus sign. This particularly affects items that were configured using total codes B (Bypass/Accumulate) and P (Print Bypassed Total) and sometimes T (Print Heading Total).

Therefore, the system will look instead at the G/L account for the previous line item (the one just above that total in the report) and hide or display the minus sign according to that type of account. Whether the report displays minus signs correctly or not will depend on how those total codes are being used on your particular report.  The computations will still be correct, of course. The computations will still be correct, of course.