For example, per the link, Dewitt's date of birth may be 1839? His place of birth may be Ohio? He lived in 1860 in Independence, Buchanan, Iowa? He also lived somewhere in Arkansas? He married sometime after the Civil War somewhere in Arkansas to Lizzie Gibbons? You believe the same Dewitt is in Sergeant, Nebraska in 1885 census? He married Delphine Welch nee Savage somewhere (Nebraska?) in the 1880s?
He's found in 1860 here? 1860 Independence, Washington Township, Buchanan County, Iowa Adin Eldridge 53 Salina Eldridge 47 Lucy Eldridge 14 Augusta Eldridge 12 Josephus Eldridge 7 Dewitt C Kelly 21 born about 1839 in Ohio
There's more than one Dewitt Kelly about the same age. You are convinced yours moved around as noted above. Would really help to see your data.