balance display with minor incorrect entry

hi,

in fs10n or fk10n or fd10n, i would like to clarify this.

when i double click credit, it should show only credit balance but i still able to see there are few lines of debit balance. likewise also happen for debit balance where there are few lines with credit.

say out of 100 lines, there are about 3 lines with opposite. meaning if double click debit, 3 lines with credit.

may i know why?

thanks