There has been some recent behavior change on SE (around July 2015). I have two accounts I use, one Google openId based for one set of sites (call it Account-A) and another SE login based for a different set of sites (Account-B). Used to be that I could be logged into one set of sites with the first user and a different set with the other users.
But now I am logged in with the Account-A on Site-1. When I go to one of the sites I use the other account for and click "log in" under the SE menu, I go to a page where I only have an option to confirm creation of an account based on my Google login. It does not present a way to log in with an SE account.
How can I log in with my other account here?
(and before you flag this as a duplicate, please ensure the other question is recent enough and that the answer is relevant. This behavior has definitely morphed over the years... and I am having trouble finding something that is relevant. For instance this question How to log in to SE sites using a second account simply points out how to merge the accounts which is NOT what I want . This question Is it possible to have different profiles/usernames across community sites? talks about presenting different user info on each site but that's not what I want -- I want totally separate accounts).