why does the FARBAR have two lines for the EDM?

[Benjamin Cowles]

They are the "initial" (3 days from effective date) deposit and "additional"(10 days...)?. It looks like it's for a situation where someone wants to do it in two trips for some reason. Can anyone explain this? Would it be like for ex you wanted more time for financing than say inspection, so a 5 day inspection with the "initial" 3 day dep and a 14 day financing contingency with the 10 day "additional" dep? Thanks