I have set up the code  using a custom hosted page and picassa API access so that when I log in with google a subsequent logout doesn’t logout of the provider. Thus the next time I log in in recalls the user and auth is passed. Nice.
However, I simply checked the youtube option under google connection and it now prompts for google user every time I log in. In fact it prompts TWICE per login.
The 1st time is as “Choose an account to continue to auth0.com” usual but then it asks for “Choose your account or a brand account to continue to auth0.com”. This 2nd prompt offers the same user account and another with same email for Google+. Is it perhaps this second ambiguity that causes the repeat login prompts. Can I cause it to be remembered somehow?