Well, you do have all the points but I do really have this kind of behavior when setting up accounts on any exchange where I engage on.
It sounds too hassle but more secure on my part.Just be sure to list all the necessary informations on all the accounts you had created.
Yes, its hard because it can be confusing for sometime but it isn't really need for you to memorize all yet you can always make a list out and just
be sure you dont expose those important infos.
Right, that is why i said that if it is work for you then it is good. Because each people have their own strategy to secure their account. Just hope we all not face that problem, or maybe stay careful to not trapped into phising site. Because all of our strategy wouldn't help if we submit our account login into phising site.