Let me draw your attention to an account-management feature that you will find on your Blogger dashboard and many other Google pages.

At the top right of your browser window, Google shows your account avatar, the little round image associated with your account.

Screen shot showing avatar
Mine is an apple. Yours should be different.
This inconspicuous image is the gateway to some useful account-identification and account-management features.

If you are ever in doubt about which account Google thinks you are in, this avatar can clear things up.