A few days ago I update the title tag including a major keyword for a website. Some wierd things happened:
- google.nl was using the new title and indeed the websites position went up.
- google.com kept using the previous title, hence the page position did not change.
- After a few days google.nl reverted back to the old title and the websites position dropped again.
I did just register the website at google (after the changing the new title) and installed a sitemap. As test I’ve added noarchive to the robots metatag; lets see in a few days if this has any effect.