Arizona's Supreme Court ruled two years ago that it's citizens have the right to access the metadata of public records.  Such data can show when and if matters were changed.

 In California, a Map stolen from a county office in the early 1900's was located and returned to the public record in 1962 and a large warning notification was included in the index of official records noting the loss and the steps to verify the map as unaltered thereafter.

 The county indexes things wrong all the time.  Current database technology make it easy to note the original mis-spelling and the correction without creating a new encumbrance or liability against another person or property.  

 The original index should be left in it's incorrect form as wrong with a note regarding the matter.  A new line of data should be added with a simple explanation.  Many GG Indices have a special "notation" section that remains unused and unfilled in most cases, but which is perfect for this problem.

On a similar note, abbreviations used to be commonly used on book indexes to save space.  The John Smith Corporation would be J.Smith Corp for the sake of space.  Sonoma County , CA recently posted a note that they are no longer abbreviating as computers allow a  much space as necessary to index the names of parties.  Good policy and good thing to keep in mind;  old things get shortened, new ones may  not be.  Multiple lessons built into that one.