Yeap, the problem was with your inline codes. You forgot to put </ref> at the end of your note reference!!! It happens to the best of us!!
=== Notes ===
: Note: Listed in the 1840 through 1880 Federal Census of Sevier County, Tennessee:<ref> : Reference: David Beckwith GenServ database BECKDA1. '' Smoky Mountain Clans, Volume 2'', Donald B. Reagan, 1983, p 16, 40: Note: Listed in the 1840 through 1880 Federal Census of Sevier County, Tennessee. </ref> (this was missing)
PS: I put it in so your sources would show.