Impact to finance export from ReSA due to late posting transaction imported to ReSA in the actual tr

The Doc ID 2156865.1 states that there is no impact in late posting transactions while importing it to ReSA and it will go through as normal current day's transaction.

There are 2 major questions on this:

1. Will the late posting be allowed even after the DAY_POST_SALE has passed? If yes, then what is the significance of this system option?

2. When the late transaction is imported with the original transaction date, how will the current store day pick up this transaction for totals etc?

    Since the original date's transactions would have been totaled and sent to finance already, how will the late transaction be sent to finance?