I pm to tell you, I leave now. but maybe not visible yet.
from directly check, this possible bug litespeed with Domain Pointers. ( cause redirect to main domain ). I leave now.
I can't check more this without Admin Panel.
sorry, something have .htaccess to force redirect. ( shouldn't relate to Domains Pointers with alias option ).
this is your hosting ? or not you could ask them to check it for you. why Domain Pointers doesn't work.
