That's the beauty of wikipedia, if you find a mistake and can source a reference, you can edit it yourself.
A couple of year back when wikipedia was being slated for being inaccurate a comparison study was conducted, Wikipedia vs. Encyclopaedia Britannica... the figures were approximately 140 innacurraces in EB and 160 in WP. The downside of EB is it's cast in print and soon out of date, where as WP can be re-edited 'til the cows come home.
Any edits do get flagged so a 'trusted' editor can go and check and change it back if need be, and in some cases, lock the page, as in
this case.