My mother is doing an update to the original Samuel Fogg book (now on CD) and will make any corrections needed in the Adendum CD. The original listings came from a variety of sources - family bibles, US census, city and county records, land deeds, wills, bills of sale, etc. - and there was always conflicting information. One of the biggest causes of confusion is when childern died in infantcy, their first names were often used again, sometimes more that once. Also nicknames were commonly used and sometimes the names got changed because often they were recorded phonetically.
You should e-mail me directly will any changes that need to made.