Midway thro shortselling our home the offer we had fell thro.Is it ok 4 the Realtor 2 continue with this offer?

The Realtor says that if he continues with the offer/paperwork with the Bank, then the bank will give us a pre-approved price,which will help us sell the home faster when it does go back on the market.How can he do that?Wont the bank require the buyer to sign the paperwork too?I ume that the bank would require the buyer to verify that their offer still stands,in which case why would the Realtor present an unworkable plan of action to us?What benefit is there in him having the house not sell/be offered for sale?He will not get any commission until it sells.