Do you ever wonder why there are “age” differences in the U. S. Census? How can your ancestor be 45 years of age in 1860 and 50 years of age in 1870?
At the time when those censuses were taken, people did not necessarily know when they were born, or exactly how old they were. This was not something thought of as important.
So don’t be surprised about how many years your ancestor aged in the time between censuses!