Don, I see you just saved the checklist. Do you have cookies enabled in your browser?
It uses this WordPress plugin that enables data persistence across sessions. If it’s not working for you my first hunch is that it’s an issue with cookies not being enabled.
For your avatar image, there is no upload. It uses the image from this service: https://en.gravatar.com/
So you can just create an account there and upload your photo to that site and it will populate your profile image here and on various other services with that image.
Let me know if that last save you just made is persisting across visits. Try logging out/in and let me know if the data saved correctly.