Hi, Pam -
I don't have any documentation that he served in PA; the Harris' 56th District Militia (VA) is what I have for his service, as well.
I do know that William's son, also William, married an Elizabeth Leffel (Loeffel), whose father John and grandfather Balzar both lived in the Berks County, PA area during the Rev. Both are DAR Patriots, although neither were documented (that I know of) as having been soldiers. Perhaps that information got tangled and ended up wrong in the book you have?
I would love to trade Dodd information with you - I know quite a bit about Barclay's family but not about your James's family.