Chubby Checks is doing something strange too.
I can login in their old system
http://www.chubbychecks.com/main.php
but can't in their new NATS system
http://nats.chubbychecks.com/
to which they switched a couple of months ago. I emailed them to ask what was going on and if my hits were still getting tracked but never got a satisfying answer.