The program doesn’t allow two users to bid the same amount, it throws a warning if any user is trying to bid an amount that is already bid.

Yes, you can modify or delete your existing bid until the deadline

By joining a chit fund, a person is forced to save a small part of his income, to meet his planned/unplanned investments or expenditure. In case of contingency, borrowing from the chit fund is much easier, simpler, faster and cheaper. In case a person wants to save till the last, the return a subscriber gets by way of chit dividends is much higher.