At the term of the county commission at which the several delinquent lists are required by law to be returned and certified, the commission shall examine and compare the list of lands and town lots on which the taxes remain due and unpaid. If any lands or town lots have been assessed more than once, or if any of the lands or town lots are not subject to taxation, or if the legal subdivision is incorrectly described, in all these cases the commission shall correct the error by the best means in their power, and cause the list so corrected to be certified and filed in the office of the clerk of the county commission.