No, for convenience, the tax payments are divided into a first-half and second-half payment schedule. The first-half is due by September 1 of that year and the second-half is due by March 1 of the following year. 

Yes, if you pay the first-half by September 1, you will receive a 2.5% discount on the amount due. The same is true for the second-half if it is paid by March 1 of the following year. 

The Sheriff hold a public auction each October where he sells all tax liens that are attached to delinquent real property. The winning bid cannot be less that the amount of real property taxes due plus all charges and interest due on the delinquent taxes.