OK, so Joe Smith has errors? Then how do you solve it?
Actually, "errors" may be too strong a word. I can see how sweetj might have gotten the numbers that he did; it's just not the way I'd do it. I would add 2 to all of his numbers in parentheses except 21 (and fix a couple of typos):
N40 (21,72) .5(103,103) W124 (125,21 .125,64,103)
(I just read the logs for Logically...Nylimb has me waaaay confused, and now I'm scared to attempt it!)
Don't be scared, the puzzle is now correct. The only thing still missing from the description is that you should list the people in alphabetical order by first name. If you list them in some other order then the ROW numbers in the equations would be wrong.