I understand that there are environment issue, but i am not that non-standard to get results not ever seen before.
I think i found the issue, your site needs to be the root domain. For example...
http://server/dcFolder/ serves your homepage. Attempt to login to the admin site and you are at http://server/dcFolder/admin and attempt to login and it should recreate my issue. Why would i have a site this way, i dont know, i was testing the package and dont want it to be at the root.
So there are some relative path coding issues somewhere, but anyway, I updated my server with host headers and its now at the root domain and i can login.