(a) Whenever it shall appear to the sheriff that any real estate included in the list has been previously conveyed by deed and no tax thereon is currently delinquent, or that the tax lien thereon has been sold previously and not redeemed, or that the tax lien thereon ought not to be sold for the amount stated therein, he shall suspend the sale thereof and report his reasons therefor to the county commission and to the Auditor. If the commission finds that the tax lien on the real estate ought not to be sold, it shall so order; but if the commission finds that the tax lien on the real estate ought to be sold for the amount stated, or for a greater or less amount, it shall order the sheriff to include such real estate in his next September list, unless sooner redeemed.

(b) In the event the list and notice of sale prescribed in section two of this article is not published, posted and completed in the manner provided by said section two, so that it is impossible for that reason, or by reason of omission of any necessary procedural act, for the sheriff to make sale of the tax lien for the real estate embraced in said list pursuant to the provisions of this chapter, then and in that event the sheriff shall certify to the Auditor, on or before December 2, following the month in which such sale should have been held, an amended list or lists of such taxes which then remain delinquent. The sheriff shall include the real estate in the last-mentioned amended list or lists in his next September list, unless sooner redeemed.