Why moz does not update actual keyword possition

[vervo]

I managed to get first place on google by keyword:  vervo.lv kravu pārvadājumi in google.lv (it is in first place all this week)

But in moz reports it shows just second position? I added so far about 100 keywords to monitor so if it shows incorrect this one how can i trust to other keyword results.

Report says it updated on 3. september and it already was in first place.

I really need to monitor keywords but if it does not show actual positions it is useless.

[TimKelsey]

Dr. Pete just posted an article that might help explain what's going on here - http://moz.com/blog/comparing-ranktracking-methods-browser-vs-crawler-vs-webmaster-tools

Moz uses a crawler to track the rankings you see in your reports. Because of personalization and a variety of other factors, the results in the report might be slightly different than what you see when manually searching in your browser.