As you work your way through genealogy records, you will find errors. In census records the errors may be made by the enumerator, transcriptionist or the ancestor. In this census, the transcriptionist shows the surname as Thomphson instead of Ghostkeeper. When you view the census document the surname is Ghostkeeper.
How do you correct the record? Ancestry does give you the ability to add or correct the record. From the pop-up box, there is a pencil icon that will give you the option to add or correct the information. Take advantage of this to help the next genealogist who may be researching this family name.