Why I have two different reputation in a same page? It's a bug, isn't it?
The page is cached & it does take some time ( give an hour or so ) to sync rep network wide.
Sathya is correct - this is due to caching elements of the page. Look again and you will find all of your reputation scores are now synced.
Update: We've now added magic sauce so that reputation and badges sync on the current site.
Note: it may still be up to 10 minutes (cache duration) out of date for the other sites, since it's not really reasonable to keep it real-time across the entire network.