[Plugin: Jetpack by WordPress.com] Stats – Showing google traffic

Hi there, just a quick question that somebody might be able to answer for me. I noticed some small amount of google traffic not appearing under the Search Engines category of Stats but instead under its own category with the referring link of just google.com

Heres a picture to illustrate

Not a big issue just curious as to why it didnt end up being listed under the Search Engines category.

Thanks

http://wordpress.org/extend/plugins/jetpack/