Strange Results in Top searches within Query Stats

Hi folks,

I'm seeing strange results in the Query Stats tab within sitemaps. Top
search term appears to be "buy revo traxxas".

I'd have expected this to be "ebusiness", or "ebusiness solutions", or
"ebusiness Cumbria", which we optimised for.

What's more, we don't show up at all for the bizarre search term that
appears to be our big hitter! This has got to be a bug right?

Any ideas?