My Website's .com doesnt seem to work

So I will try and go through this as detailed as possible. I had my own .com, I later decided I wanted to try CafeCommerce. After about four days, I decided i wanted to use CafeCommerce as my domain hosting because I believe its the better way to go. Now, my site doesnt work as www.para-cordthis.com BUT still works as para-cordthis.mycafecommerce.com
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On a side topic, I am also having issues with the shipping. I want to set a BASE price for EVERy item. I know how much each item would cost to ship, so I don't need no automatic generating system through USPS but it still makes me use it and when I try and use their system, it says its gonna cost 16 dollars to ship something I know ships for 1.95