GL account balances missmatch in FBL3n and FS10n particular period

Hi All,

I have problem for the period 3 i have checked the FS10n balances showing $2.8m but i have click the cumulative balance column it will showing the balance $25m. what is the cause of differen between FS10n balance and FBL3n line item.

Please let me know the what proceedure i need to follow for checking balance,