Clearing your DNS cache makes your browser go out and ask for the IP again, but the first server it asks may be "lazy" and return its cached information. I can take a day+ for cached copies to expire fully.
Try clearing your browser cache too. Or add ?fooo to the end of the URL.
The default page is because the x10server has not updated its map connecting domains to accounts. There are so many requests per day, that they are batched and staggered. It can take up to 24 hrs for that update to finish.