For Example: Stock A bought in first time is 34,557.25, second time bought 2,253.80 total amount is 36,812.05 but in Summary page Cost Basis shown Stock A total amount is 36,814.04
The reason for the total amount different from its origin is due to rounding numbers. Summary page will include Average Price which will include rounding numbers and resulted in mismatch in numbers. If we do Cost Basis from the transaction will still mismatch when Cost Basis x Average Price and number of shares.
Hence we kept it as it is to create to avoid any further misunderstanding.