@matigo Ok. I've unprotected the main site now. However, even when it was password protected earlier, all of my previous posts made earlier this morning has gone to the main site and appears there.
In the meantime, if you believe, all these issues because of my multiple sites and that I should get rid of my other sites with sub-domain(s) and also the password protected site on 10centuries(dot)org domain, please let me know.