i would be very upset too...yes it is great they are going in order of the people who expressed interest HOWEVER unless someone has paid a deposit for real, then they should not be telling you one thing and other people another...
i do not blame you - i would be upset as well

maybe this is a "sign" that this person is not the right breeder either?
you will find your perfect puppy and it sounds like you would give her a wonderful forever home!!