My Bing stats seem wildly inaccurate. Any ideas?

[Cut2SizeMetals]

One of my keywords shows "Not in the top 50" when it is clearly ranking number 1 on the SERP.  I am not logged in, and I searched from outside my local area to eliminate geolocated results.  Others show a rank of 7 (actually 4) and 48 (actually 20).  Any ideas?

[KeriMorgret]

I'd email help@seomoz.org with your account information and treat this as a bug report and see what they can figure out.