Their page makes it pretty clear that they're perfectly happy to tell a half-truth.
snopes is the highest regarded debunker of chainmail, internet rumors, and general urban legends on web. i've been reading them for years, and they quite commonly rule things as "half truth." i have never noticed anything -- except for this one article -- that could be considered biased in any way. so i'm inclined to believe it's a mistake, or they've been duped as well.
write them with your information, and see what they say.
Edited by arachnophilia, : No reason given.