I had been previously been using one API key for multiple self-hosted blogs. But for some unknown reason the stats plugin stopped working on one of them, so I tried to create a new WP user and add that API key, but it's still not taking it. It sends me in an endless loop:
1: Enter API key.
2a: The API key "******" belongs to the WordPress.com account of "SOMEUSERNAME". If this is not your account, please re-enter your API key.
2b: Add new blog to my account
2a sends me back to 1.
2b gives an error:
Error from last API Key attempt:
Missing API Key
Which prompts to enter API key... back to 1.
What is the recommended way to use API keys? Can you use one key across multiple sites? Or should you get 1 key per site, and therefore create multiple WP.com users (one per blog)?
Thanks for your help.
P.S. I've tried deactivating and reactivating the stats plugin several times now.