Arnoud

I have a double entry for my website in my wordpress.com profile.
As I only have one account I can’t check if this is the case for others as well.

Given your reply, I assume it’s not.
That’s also probably the case for not noticing the URL change.
I also have a self hosted site. The view source methode you mentioned works just as good! It’s the number that matters.

I’m glad it worked out for you! 🙂
(And hopefully others as well!)

I think I may have found a suitable solution.
It doesn’t involve uninstalling, just editing a value your blog’s database.

Here is how it works:

Login to http://dashboard.wordpress.com/wp-login.php
In the left menu click “Blog stats”

In the top right corner there is a dropdownlist that shows you the (duplicate) entries for your blogstats.
Select (the correct) one and click switch.
Notice the URL change in the title bar!

The URL will change into something that ends with the ID of your blog.
For example:
http://dashboard.wordpress.com/wp-admin/index.php?page=stats&unit=1&blog=1234567

Copy paste the number!

Now the tricky part:
Open up phpAdmin (or what ever tool you use to edit your database).
Open the wp_option table
Look for the stats_options value.
Open this value and edit it.

It will look similar to this:

a:7:{s:4:”host”;s:16:”example.com”;s:4:”path”;s:1:”/”;
s:7:”blog_id”;i:9876543;s:7:”version”;
s:1:”2″;s:5:”error”;b:0;s:9:”key_check”;
b:0;s:7:”api_key”;s:12:”APIKEYHIDDEN”;}

Notice the blog_id value, it’s 9876543.
Change this number into the value of the correct blog stats, in my example it’s 1234567.

Save the value. And you’re done!
Your stats will now be logged to the stats you’ve had before upgrading your blog.

Also change your profile @ WordPress.com and select the correct stats in the primary blog setting on your profile page.