Our best suggestion would be to give your password another reset from this link. Once you've done that, go here and click "Sign out everywhere". This will force-log out all sessions that are currently active.
In case your account was created with your Facebook profile, or linked to it, we also suggest resetting your Facebook password as well.
In case you're still having issues after this, our customer support team will be glad to help you out with this one. You can get in touch with them via email, Twitter or Facebook. They'll reply to your message as soon as possible.