Parked Domain Confusion

Bought some hosting with BlueHost, and when I signed up, I choose DekhoForum as my domain name.

I proceeded to setup a website with WordPress 3.1 at the root folder of that address.

Realised that my company had already reserved some domain names that were more suitable.

So we got those domains forwarded to the BlueHost nameservers.

So. I now have a parked domain for dekho.com.au as shown in my cPanel here.

So if I hit the parked domain, it does take me to my WordPress install, but then when I click on subsequent links, it will take me to stuff like dekhoforum.com/page=1, when I would prefer it to retain dekho.com.au/page=1

How do I fix this?

Seeing as I am still in the early stages of my development, I would like to iron this issue out from the beginning to avoid any headaches further down the track.