Google search engine bug

Today I found a bug on the Google search engine, very easy to reproduce.
1) Search "Simone Tregnago" with quotes. As you can see in the following picture the search will return 269 results: 10 pages.


At the bottom of the page you can select any of the 10 pages. Ok, try to go to the 10th clicking directly on the number 10.



Ops! Google now showed the 5th page instead of the 10th, and actually is the last page! Also note that the results become 42 instead of 269!



That's a bug, sure. I have to immediately write to Google's guys :)