Trouble buying a product

Hello David -

I am having trouble figuring out how to buy a certain product on the Demo page.
If I click on "GoPro HERO4 Black" and I click on the "Details" button, then the "Information" and "Buy Options" tabs are displayed.
If I then click on the "Buy Options" button I get the items "GoPro Black" for 49.99 and "GoPro White" for 59.99.
Each has a pre-filled quantity of 1. Not sure why the "GoPro White" is there in the first place but I can't get rid of it.
Setting the Quantity of the "GoPro White to 0", since I do not want it, before clicking the "Add to Bashet" button gives me the following error:

The following minimum quantities are required:

Go Pro WhiteMin Qty: 1
If these items are out of stock, you cannot proceed, sorry

It is possible that I am missing something but I do not know what.

Thanks for taking a look at this.