I have noticed that with the Google login (whether it has been this way for a while, or just recent Google change) that when you are putting in your credentials to sign on, it asks to 'Choose an account to continue to oneall.com' likewise when if there is an additional piece of information that needs to be approved, such as an Address, that it asks that as well. Why is this the case, and not my site that is asking if it is ok to get this information?
this is in fact a change from Google, we unfortunately have no influence on the login screen.
what you could do is replace the OneAll subdomain by your own sub-domain. So this purpose we have the "API Alias" feature. It however requires Silver plan and you need to update your social network apps to use the alias.