All the permission issuses are caused by the uid/gid that frontpage extension run as.
I wonder what uid/gid is used under cPanel + Apache, root:$user? What is the ownership of file uploaded via FP extension?
LiteSpeed run it under $user:nobody, same as the the owner of doc_root. I can change it to $user:$user, or root:$user, but need to find out which one should be used.