Use this backup link to the troubleshooting page:
http://nabutso.com:4438/FFXI/troubleshooting.pdfYour issues are, first, the double password entry (issue 1.1). You've noticed that you're able to bypass it by logging in twice but that's annoying, so use the advice on that page instead for that issue.
2nd, you probably are using a name that's already taken, which is why you aren't able to create your character. This is issue 1.16 on that page. The important thing to note is that you need to close the client each time you try to make a char and it fails, because it will continue to fail after the first time.