1800 US census records add up and up and up
Hm, 4 = 2+2+2+2+2+2+2+2+1+2+3+2+2
The 4 are 3 in Rhode Island, 1 in New York.
Change the surname and repeat. For most surnames I tried the counts did add up as expected, but not this one:
Here I get 80 instead of the expected 60.