Strange SERP on generic keyword

[kristian nissen]

Hi.
I'm doing a SEO project for a danish Web site. I have managed to place the site as #1 for their major keyword a couple of times on google.dk (world-wide search).

My question is; when my site is not #1 I'm usually in the top 5 and my biggest competitor is #1, but when I'm #1 my competitor is not in the top 5. How can that be? How can the SERP be so different?

[edited by: caveman at 5:19 pm (utc) on June 19, 2006]
[edit reason] Removed specifics, per TOS. [/edit]

[arran]

You are hitting different datacenters. Each datacenter can have potentially distinct data/algorithms/bugs.

arran.

[sunny_kat]

The different results you are going through is being displayed from various datacenters of Google