Ok.
If you want say brc.co.cc to be the exact same site as brc.x10hosting.com you have two options. You chose the third.
You added it as an add-on domain and set it to redirect to your brc.x10hosting.com . Not the right way.
You have to go to cPanel and remove it as an add-on domain.
I would wait a bit and make sure the sytem accepts your deletion.
Then go to cPanel and add it as a parked domain. No redirects.
Go to your browser and clear your cache/browsing history. If you don't, you won't see the change.
That should work. But the system has been a bit off recently. If you get an error message, post it back here.
* Note: you can also replace your x10hosting subdomain with your co.cc domain as your main domain . You do that via the Account Panel (after dropping it as an add on). But if you drop the x10hosting.com subdomain, you may not be able to get it back. Parking the domain is probably better.